Episode 140: Improving Diplomatic Ties

December 16, 2025 Joshua Badgley

Silla

Silla is the most prominent foreign entity in contact with the Yamato court at this time. Furthermore, under King Munmu the Great they are at a high point in their history. With the help of the Tang Empire they have defeated Baekje and Goguryeo. Then, after years of struggle, they would also push the Tang out of the peninsula, at least past the Taedong river, which runs through Pyongyang. From the Taedong south—or Southeast—was what we often refer to as Unified Silla. For the first time, the peninsula was under a single authority, and it would start to bring a unification of culture as well as politics. It seems that Silla was also interested in mending fences with Yamato. The two had long had an adversarial relationship, but it seems that was changing.

Goguryeo

For a kingdom that was destroyed, Goguryeo continued to have quite the presence in the Chronicles. While Baekje and Nimna had both largely been given up as lost, Goguryeo, despite its apparent non-existence, refused to give up the ghost, as it were. This appears to be in part due to local rebellions and restoration efforts, but also thanks to official sponsorship by Silla, who no doubt realized that Goguryeo’s restoration kept the Tang dynasty busy. And so we see Goguryeo envoys to the Yamato court, though each time accompanied by Silla escorts.

Tamna

Tamna is on the island of Jeju, in the ocean south of the Korean peninsula. Though archaeological evidence suggests that they have had close ties with Yayoi Japan and with Baekje, among others, from at least the 1st century, we don’t see them show up in the Chronicles until the 7th. This may be because they were dealing with groups other than Yamato. With the fall of Baekje, the appearance of Tamna at the Yamato court appears to have grown. This could be coincidence just having to do with timing, though it is interesting that Tamna appears to show a lot of linguistic similarities in terms of names with the people of the Japanese archipelago. Alexander Vovin suggested that they were one of the last hold-outs of a continental proto-Japonic speaking group. Their language and entire way of life would eventually come under the sway of the rest of the peninsula before they were able to record too much of their own history, and so mostly we know of them through the writings of others.

Tang Empire

The Tang Empire was expansive, dwarfing Yamato or Silla, but that expanse was also a problem. They had a massive border to defend, and they were regularly moving between fighting with Tibet and fighting on the Korean peninsula, which was no small feat. Eventually the peninsula would prove too much trouble, and they would relocate to Liaodong and focus on the former Goguryeo territory. The Tang court was also dealing with other issues. Tang Gaozong was the nominal ruler, but his wife, the Empress Wu Zetian, had been given unprecedented power, so that often it was her edicts that were actually being followed. For all of its power and might, we don’t see any more Tang envoys during this reign.

Mishihase

The Mishihase, or Sushen, are most likely the people also known as the Ohkotsk Sea Culture. We don’t have any of their own writings, and the term the Chronicles use for them appears to be appropriated from mainland references to another people altogether. But based on their activities and timeframe, the Ohkotsk Sea Culture is likely the group we can best identify them as. The Ohkotsk Sea Culture, itself, is a name for the culture that produced a variety of material goods found in archaeological excavations around the Ohkotsk Sea dated to around this time. The Ohokotsk Sea Culture appears to have had influence from or on the people we know today as the Nivkh and the Ainu—modern indigenous groups in Hokkaido, Sakhalin, and the area near the mouth of the Amur River.

Non-Yamato Cultures on the Archipelago

We don’t hear much about the Emishi at this point in time, but there are plenty of other people who are outside of the Yamato political sphere, and who are often represented as culturally unique or distinct.

Hayato

The Hayato are perhaps the most famous group of the ones mentioned. They are from Southern Kyushu—the regions of Ata and Osumi. Ata is thought to be the area of Satsuma, and Osumi refers to the Osumi peninsula. We do see some differences in the material culture of these areas, but also plenty of similarities, suggesting that they may not be entirely distinct, just outside of Yamato’s formal political reach.

Tanegashima and Yakushima

These are two islands south of Kyushu, at the head of the chain of islands made from the volcanic sea ridge that travels from the archipelago all the way to the island of Taiwan, many of the islands of which make up the Ryukyuan, or Okinawan, island chain. Tanegashima is known to us, today, because it was one of the first places that Europeans landed and became an early hub of firearms production—but that was still centuries off. Yakushima is known today as a UNESCO world heritage site for its pristine forests. It has long been inhabited, but never tremendously so.

Welcome to Sengoku Daimyo’s Chronicles of Japan. My name is Joshua and this is episode 140: Improving Diplomatic Ties
Garyang Jyeongsan and Gim Hongsye looked out from the deck of their ship, tossing and turning in the sea. The waves were high, and the winds lashed at the ship, which rocked uncomfortably beneath their feet. Ocean spray struck them from below while rain pelted from above.
Through the torrential and unstable conditions, they looked out for their sister ship. It was their job to escort them, but in these rough seas, bobbing up and down, they were at the mercy of the elements. One minute they could see them, and then next it was nothing but a wall of water. Each time they caught a glimpse the other ship seemed further and further away. They tried calling out, but it was no use—even if they could normally have raised them, the fierce winds simply carried their voices out into the watery void. Eventually, they lost sight of them altogether.
When the winds died down and the seas settled, they looked for their companions, but they saw nothing, not even hints of wreckage on the ocean. They could only hope that their fellow pilots knew where they were going. As long as they could still sail, they should be able to make it to land—either to the islands to which they were headed, or back to the safety of the peninsula.
And so the escort ship continued on, even without a formal envoy to escort. They would hope for the best, or else they would explain what would happen, and hope that the Yamato court would understand.
The seas were anything but predictable, and diplomacy was certainly not for the faint of heart.

We are going through the period of the reign of Ohoama, aka Temmu Tennou. It started in 672, with the death of his brother, Naka no Oe, remembered as the sovereign Tenji Tenno, when Temmu took the throne from his nephew, Ohotomo, aka Kobun Tenno, in what would become known as the Jinshin no Ran. From that point, Ohoama continued the work of his brother in creating a government based on a continental model of laws and punishments—the Ritsuryo system. He accomplished this with assistance from his wife, Uno, and other members of the royal family—his own sons, but also nephews and other princes of the time. And so far most of our focus has been on the local goings on within the archipelago.
However, there was still plenty going on in the rest of the world, and though Yamato’s focus may have been on more local affairs, it was still engaged with the rest of the world—or at least with the polities of the Korean Peninsula and the Tang Dynasty. This episode we are going to look at Yamato’s foreign relations, and how they were changing, especially as things changed on the continent.
Up to this point, much of what had been happening in Yamato had been heavily influenced by the mainland in one way or another. And to begin our discussion, we really should backtrack a bit—all the way to the Battle of Baekgang in 663, which we discussed in Episode 124. That defeat would lead to the fall of Baekje, at the hands of the Silla-Tang alliance. The loss of their ally on the peninsula sent Yamato into a flurry of defensive activity. They erected fortresses on Tsushima, Kyushu, and along the Seto Inland Sea. They also moved the capital up to Ohotsu, a more easily defended point on the shores of Lake Biwa, and likewise reinforced various strategic points in the Home Provinces as well. These fortresses were built in the style and under the direction of many of the Baekje refugees now resettled in Yamato.
For years, the archipelago braced for an invasion by the Silla-Tang alliance. After all, with all that Yamato had done to support Baekje, it only made sense, from their perspective, for Silla and Tang to next come after them. Sure, there was still Goguryeo, but with the death of Yeon Gaesomun, Goguryeo would not last that long. With a unified peninsula, then why wouldn’t they next look to the archipelago?
And yet, the attack never came. While Yamato was building up its defenses, it seems that the alliance between Silla and Tang was not quite as strong as their victories on the battlefield may have made it seem. This is hardly surprising—the Tang and Silla were hardly operating on the same scale. That said, the Tang’s immense size, while bringing it great resources, also meant that it had an extremely large border to defend. They often utilized alliances with other states to achieve their ends. In fact, it seems fairly common for the Tang to seek alliances with states just beyond their borders against those states that were directly on their borders. In other words, they would effectively create a pincer maneuver by befriending the enemy of their enemy. Of course. Once they had defeated said enemy well, wouldn’t you know it, their former ally was now their newest bordering state.
In the case of the Silla-Tang alliance, it appears that at the start of the alliance, back in the days of Tang Taizong, the agreement, at least from Silla’s perspective, was that they would help each other against Goguryeo and Baekje, and then the Tang dynasty would leave the Korean peninsula to Silla. However, things didn’t go quite that smoothly. The fighting against Goguryeo and Baekje can be traced back to the 640s, but Tang Taizong passed away in 649, leaving the throne to his heir, Tang Gaozong. The Tang forces eventually helped Silla to take Baekje after the battle of Baekgang River in 663, and then Goguryeo fell in 668, but the Tang forces didn’t leave the peninsula. They remained in the former territories of Baekje and in Goguryeo, despite any former agreements. Ostensibly they were no doubt pointing to the continuing revolts and rebellions in both regions. While neither kingdom would fully reassert itself, it didn’t mean that there weren’t those who were trying. In fact, the first revolt in Goguryeo was in 669. There was also a revolt each year until 673. The last one had some staying power, as the Goguryeo rebels continued to hold out for about four years.
It is probably worth reminding ourselves that the Tang dynasty, during this time, had reached out on several occasions to Yamato, sending diplomatic missions, as had Silla. While the Yamato court may have been preparing for a Tang invasion, the Tang perspective seems different. They were preoccupied with the various revolts going on, and they had other problems. On their western border, they were having to contend with the kingdom of Tibet, for example. The Tibetan kingdom had a powerful influence on the southern route around the Taklamakan desert, which abuts the Tibetan plateau. The Tang court would have had to divert resources to defend their holdings in the western regions, and it is unlikely that they had any immediate designs on the archipelago, which I suspect was considered something of a backwater to them, at the time. In fact, Yamato would have been much more useful to the Tang as an ally to help maintain some pressure against Silla, with whom their relationship, no longer directed at a common enemy, was becoming somewhat tense.
In fact, just before Ohoama came to the throne, several events had occurred that would affect the Silla-Tang alliance.
The first event is more indirect—in 670, the Tibetan kingdom attacked the Tang empire. The fighting was intense, and required serious resources from both sides. Eventually the Tibetan forces were victorious, but not without a heavy toll on the Tibetan kingdom, which some attribute to the latter’s eventual demise. Their pyrrhic victory, however, was a defeat for the Tang, who also lost troops and resources in the fighting. Then, in 671, the Tang empire would suffer another loss as Silla would drive the Tang forces out of the territory of the former kingdom of Baekje.
With the Baekje territory under their control, it appears that Silla was also working to encourage some of rebellions in Goguryeo. This more than irked the Tang court, currently under the formal control of Tang Gaozong and the informal—but quite considerable—control of his wife, Wu Zetian, who some claim was the one actually calling most of the shots in the court at this point in time. Silla encouragement of restoration efforts in Goguryeo reached the Tang court in 674, in and in 675 we see that the Tang forces were sent to take back their foothold in the former Baekje territory. Tang defeated Silla at Gyeonggi, and Silla’s king, Munmu, sent a tribute mission to the Tang court, apologizing for their past behavior.
However, the Tang control could not be maintained, as they had to once again withdraw most of their troops from the peninsula to send them against the Tibetan kingdom once more. As soon as they did so, Silla once again renewed their attacks on Tang forces on the peninsula. And so, a year later, in 676, the Tang forces were back. They crossed the Yellow Sea to try and take back the Tang territories on the lower peninsula, but they were unsuccessful. Tang forces were defeated by Silla at Maeso Fortress in modern day Yeoncheon. After a bit more fighting, Silla ended up in control of all territory south of the Taedong River, which runs through Pyongyang, one of the ancient capitals of Goguryeo and the capital of modern North Korea. This meant that the Tang dynasty still held much of the territory of Goguryeo under their control.
With everything that was going on, perhaps that explains some of the apparently defensive measures that Yamato continued to take. For example, the second lunar month of 675, we know that Ohoama proceeded to Takayasu castle, likely as a kind of formal inspection. Then, in the 10th lunar month of 675 Ohoama commanded that everyone from the Princes down to the lowest rank were to provide the government with weapons. A year later, in the 9th month of 676, the Princes and Ministers sent agents to the capital and the Home Provinces and gave out weapons to each man. Similar edicts would be issued throughout the reign. So in 679 the court announced that in two years time, which is to say the year 681, there would be a review of the weapons and horses belonging to the Princes of the Blood, Ministers, and any public functionaries. And in that same year, barrier were erected for the first time on Mt. Tatsta and Mt. Afusaka, along with an outer line of fortifications at Naniwa.
While some of that no doubt also helped to control internal movements, it also would have been useful to prepare for the possibility of future invasions. And the work continued. In 683 we see a royal command to all of the various provinces to engage in military training. And in 684 it was decreed at that there would be an inspection in the 9th month of the following year—685—and they laid out the ceremonial rules, such as who would stand where, what the official clothing was to look like, etc.
Furthermore, there was also an edict that all civil and military officials should practice the use of arms and riding horses. They were expected to supply their own horses, weapons, and anything they would wear into battle. If they owned horses, they would be considered cavalry soldiers, while those who did not have their own horse would be trained as infantry. Either way, they would each receive training, and the court was determined to remove any obstacles and excuses that might arise.   Anyone who didn’t comply would be punished. Non compliance could mean refusing to train, but it could also just mean that they did not provide the proper horses or equipment, or they let their equipment fall into a state of disrepair. Punishments could range from fines to outright flogging, should they be found guilty. On the other hand, those who practiced well would have any punishments against them for other crimes reduced by two degrees, even if it was for a capital crime. This only applied to previous crimes, however—if it seemed like you were trying to take advantage of this as a loophole to be able to get away with doing your own thing than the pardon itself would be considered null and void.
A year later, the aforementioned inspection was carried out by Princes Miyatokoro, Hirose, Naniwa, Takeda, and Mino. Two months later, the court issued another edict demanding that military equipment—specifically objects such as large or small horns, drums, flutes, flags, large bows, or catapults—should be stored at the government district house and not kept in private arsenals. The “large bow” in this case may be something like a ballista, though Aston translates it to crossbow—unfortunately, it isn’t exactly clear, and we don’t necessarily have a plethora of extant examples to point to regarding what they meant. Still, these seem to be focused on things that would be used by armies—especially the banners, large bows, and catapults. The musical instruments may seem odd, though music was often an important part of Tang dynasty military maneuvers. It was used to coordinate troops, raise morale, provide a marching rhythm, and more. Granted, much of this feels like something more continental, and it is unclear if music was regularly used in the archipelago. This could be more of Yamato trying to emulate the Tang dynasty rather than something that was commonplace on the archipelago. That might also explain the reference to the Ohoyumi and the catapults, or rock throwers.
All of this language having to do with military preparations could just be more of the same as far as the Sinicization of the Yamato government is concerned; attempts to further emulate what they understood of the civilized governments on the mainland—or at least their conception of those governments based on the various written works that they had imported. Still, I think it is relevant that there was a lot of uncertainty regarding the position of various polities and the potential for conflict. Each year could bring new changes to the political dynamic that could see military intervention make its way across the straits. And of course, there was always the possibility that Yamato itself might decide to raise a force of its own.
Throughout all of this, there was continued contact with the peninsula and other lands. Of course, Silla and Goguryeo were both represented when Ohoama came to the throne—though only the Silla ambassador made it to the ceremony, apparently. In the 7th lunar month of 675, Ohotomo no Muraji no Kunimaro was sent to Silla as the Chief envoy, along with Miyake no Kishi no Irishi. They likely got a chance to witness first-hand the tensions between Silla and the Tang court. The mission would return in the second lunar month of the following year, 676. Eight months later, Mononobe no Muarji no Maro and Yamashiro no Atahe no Momotari were both sent. That embassy also returned in the 2nd lunar month of the following year.
Meanwhile, it wasn’t just Yamato traveling to Silla—there were also envoys coming the other way. For example, in the 2nd lunar month of 675 we are told that Silla sent Prince Chyungweon as an ambassador. His retinue was apparently detained on Tsukushi while the actual envoy team went on to the Yamato capital. It took them about two months to get there, and then they stayed until the 8th lunar month, so about four months in total.
At the same time, in the third month, Goguryeo and Silla both sent “tribute” to Yamato. And in the 8th month, Prince Kumaki, from Tamna, arrived at Tsukushi as well. Tamna, as you may recall, refers to nation on the island known today as Jeju. The late Alexander Vovin suggested that the name originated from a proto-Japonic cognate with “Tanimura”, and many of the names seem to also bear out a possible Japonic influence on the island nation. Although they only somewhat recently show up in the Chronicles from our perspective, archaeological evidence suggests that they had trade with Yayoi Japan and Baekje since at least the first century. With the fall of Baekje, and the expansion of Yamato authority to more of the archipelago, we’ve seen a notable uptick in the communication between Tamna and Yamato noted in the record. A month after the arrival of Prince Kumaki in Tsukushi, aka Kyushu, it is noted that a Prince Koyo of Tamna arrived at Naniwa. The Tamna guests would stick around for almost a year, during which time they were presented with a ship and eventually returned in the 7th lunar month of the following year, 676.   Tamna envoys, who had also shown up in 673, continued to be an annual presence at the Yamato court through the year 679, after which there is an apparent break in contact, picking back up in 684 and 685.
676 also saw a continuation of Silla representatives coming to the Yamato court, arriving in the 11th lunar month. That means they probably passed by the Yamato envoys heading the other way. Silla, under King Mumnu, now had complete control of the Korean peninsula south of the Taedong river. In the same month we also see another mission from Goguryeo, but the Chronicle also points out that the Goguryeo envoys had a Silla escort, indicating the alliance between Silla and those attempting to restore Goguryeo—or at least the area of Goguryeo under Tang control. The Tang, for their part, had pulled back their commandary to Liaodong, just west of the modern border between China and North Korea, today. Goguryeo would not go quietly, and the people of that ancient kingdom—one of the oldest on the peninsula—would continue to rise up and assert their independence for years to come.
The chronicles also record envoys from the somewhat mysterious northern Mishihase, or Sushen, thought to be people of the Okhotsk Sea culture from the Sakhalin islands. There were 11 of them, and they came with the Silla envoys, possibly indicating their influence on the continent and through the Amur river region. Previously, most of the contact had been through the regions of Koshi and the Emishi in modern Tohoku and Hokkaido. This seems to be their only major envoy to the Yamato court recorded in this reign.
Speaking of outside groups, in the 2nd lunar month of 677 we are told that there was an entertainment given to men of Tanegashima under the famous Tsuki tree west of Asukadera. Many people may know Tanegashima from the role it played in the Sengoku Period, when Europeans made contact and Tanegashima became a major hub of Sengoku era firearm manufacturing. At this point, however, it seems that it was still a largely independent island in the archipelago off the southern coast of Kyushu. Even southern Kyushu appears to have retained some significant cultural differences at this time, with the “Hayato” people being referenced in regards to southern Kyushu—we’ll talk about them in a bit as they showed up at the capital in 682.
Tanegashima is actually closer to Yakushima, another island considered to be separate, culturally, from Yamato, and could be considered the start of the chain of islands leading south to Amami Ohoshima and the other Ryukyuan islands. That said, Tanegashima and Yakushima are much closer to the main islands of the archipelago and show considerable influence, including Yayoi and Kofun cultural artifacts, connecting them more closely to those cultures, even if Yamato initially saw them as distinct in some way.
A formal Yamato envoy would head down to Tanegashima two years later, in the 11th lunar month of 679. It was headed up by Yamato no Umakahibe no Miyatsuko no Tsura and Kami no Sukuri no Koukan. The next reference to the mission comes in 681, when the envoys returned and presented a map of the island. They claimed that it was in the middle of the ocean, and that rice was always abundant. With a single sowing of rice it was said that they could get two harvests. Other products specifically mentioned were cape jasmine and bulrushes, though they then note that there were also many other products that they didn’t bother to list. This must have been considered quite the success, as the Yamato envoys were each awarded a grade of rank for their efforts.   They also appear to have returned with some of the locals, as they were entertained again in Asuka—this time on the riverbank west of Asukadera, where various kinds of music were performed for them.
Tanegashima and Yakushima would be brought formally under Yamato hegemony in 702 with the creation of Tane province, but for now it was still considered separate. This was probably just the first part of the efforts to bring them into Yamato, proper.
Getting back to the Silla envoys who had arrived in 676, they appear to have remained for several months. In the third lunar month of 677 we are told that they, along with guests of lower rank—thirteen persons all told—were invited to the capital. Meanwhile, the escort envoys and others who had not been invited to the capital were entertained in Tsukushi and returned from there.
While this was going on, weather out in the straits drove a Silla boat to the island of Chikashima. Aboard was a Silla man accompanined by three attendants and three Buddhist priests. We aren’t told where they were going, but they were given shelter and when the Silla envoy, Kim Chyeonpyeong, returned home he left with those who had been driven ashore, as well.
The following year, 678, was not a great one for the Silla envoys. Garyang Jyeongsan and Gim Hongsye arrived at Tsukushi, but they were just the escorts. The actual envoys had been separated by a storm at sea and never arrived. In their place, the escort envoys were sent to the capital, probably to at least carry through with the rituals of diplomacy. This was in the first month of the following year, 679, and given when envoys had previously arrived, it suggests to me that they waited a few months, probably to see if the envoys’ ship eventually appeared and to give the court time to figure out what to do. A month later, the Goguryeo envoys arrived, still being accompanied by Silla escorts, also arrived.
Fortunately the Yamato envoys to Silla and elsewhere fared better. That year, 679, the envoys returned successfully from Silla, Goguryeo, and Tamna. Overall, though, I think it demonstrates that this wasn’t just a pleasure cruise. There was a very real possibility that one could get lost at sea. At the same time, one needed people of sufficient status to be able to carry diplomatic messages and appropriately represent the court in foreign lands. We often seen envoys later taking on greater positions of responsibility in the court, and so you didn’t have to go far to find those willing to take the risk for later rewards.
That same year, another tribute mission from Silla did manage to make the crossing successfully. And in this mission we are given more details, for they brought gold, silver, iron, sacrificial cauldrons with three feet, brocade, cloth, hides, horses, dogs, mules, and camels. And those were just the official gifts to the court. Silla also sent distinct presents for the sovereign, the queen, and the crown prince, namely gold, silver, swords, flags, and things of that nature.
This appears to demonstrate increasingly close ties between Silla and Yamato. All of that arrived in the 10th lunar month of 679, and they stayed through the 6th lunar month of 680—about 7 to 9 months all told, depending on if there were any intercalary months that year. In addition to entertaining the Silla envoys in Tsukushi—it is not mentioned if they made it to the capital—we are also told that in the 2nd lunar month, halfway through the envoys’ visit, eight labourers from Silla were sent back to their own country with gifts appropriate to their station.
Here I have to pause and wonder what exactly is meant by this. “Labourer” seems somewhat innocuous. I suspect that their presence in Yamato may have been less than voluntary, and I wonder if these were captured prisoners of war who could have been in Yamato now for over a decade. If so, this could have been a gesture indicating that the two sides were putting all of that nastiness with Baekje behind them, and Yamato was accepting Silla’s new role on the peninsula. Or maybe I’m reading too much into it, but it does seem to imply that Silla and Yamato were growing closer, something that Yamato would need if it wanted to have easy access, again, to the wider world.
Speaking of returning people, that seems to have been something of a common thread for this year, 680, as another mission from Goguryeo saw 19 Goguryeo men also returned to their country. These were condolence envoys who had come to mourn the death of Takara Hime—aka Saimei Tennou. They must have arrived in the midst of all that was happening peninsula, and as such they were detained. Their detention is somewhat interesting, when you think about it, since technically Baekje and Goguryeo—and thus Yamato—would have been on the same side against the Silla-Tang alliance. But perhaps it was just considered too dangerous to send them home, initially, and then the Tang had taken control of their home. It is unclear to me how much they were being held by Yamato and how much they were just men without a country for a time. This may reflect how things on the mainland were stabilizing again, at least from Yamato’s perspective. However, as we’ll discuss a bit later, it may have also been another attempt at restoring the Goguryeo kingdom by bringing back refugees, especially if they had connections with the old court. The Goguryeo envoys—both the recent mission and those who had been detained—would remain until the 5th lunar month of 681, when they finally took their leave. That year, there were numerous mission both from and to Silla and Goguryeo, and in the latter part of the year, Gim Chyungpyeong came once again, once more bearing gives of gold, silver, copper, iron, brocade, thin silk, deerskins, and fine cloth. They also brought gold, silver, flags of a rosy-colored brocade and skins for the sovereign, his queen, and the crown prince.
That said, the 681 envoys also brought grave news: King Munmu of Silla was dead. Munmu had reigned since 661, so he had overseen the conquest of Silla and Goguryeo. His regnal name in Japanese might be read as Monmu, or even “Bunbu”, referencing the blending of literary and cultural achievements seen as the pinnacle of noble attainment. He is known as Munmu the Great for unifying the peninsula under a single ruler—though much of the Goguryeo territory was still out of reach. Indeed he saw warfare and the betterment of his people, and it is no doubt significant that his death is recorded in the official records of the archipelago. He was succeeded by his son, who would reign as King Sinmun, though the succession wasn’t exactly smooth.
We are told that Munmu, knowing his time was short, requested that his son, the Crown Prince, be named king before they attended to Munmu’s own funerary arrangements, claiming that the throne should not sit vacant. This may have been prescient, as the same year Munmu died and Sinmun ascended to the throne there was a revolt, led by none other than Sinmun’s own father-in-law, Kim Heumdol. Heumdol may, himselve, have been more of a figurehead for other political factions in the court and military. Nonetheless, the attempted coup of 681 was quickly put down—the envoys in Yamato would likely only learn about everything after the dust had settled upon their return.
The following year, 682, we see another interesting note about kings, this time in regards to the Goguryeo envoys, whom we are told were sent by the King of Goguryeo. Ever since moving the commandery to Liaodong, the Tang empire had claimed dominion over the lands of Goguryeo north of the Taedong river. Originally they had administered it militarily, but in 677 they crowned a local, Bojang as the “King of Joseon”, using the old name for the region, and put him in charge of the Liaodong commandery. However, he was removed in 681, and sent into exile in Sichuan, because rather than suppressing revolt, he had actually encouraged restoration attempts, inviting back Goguryeo refugees, like those who had been detained in Yamato. Although Bojang himself was sent into exile, his descendants continued to claim sovereignty, so it may have been one of them that was making the claim to the “King of Goguryeo”, possibly with Silla’s blessing.
Later that year, 682, we see Hayato from Ohosumi and Ata—possibly meaning Satsuma—the southernmost point of Kyushu coming to the court in 682. They brought tribute and representatives of Ohosumi and Ata wrestled, with the Ohosumi wrestler emerging victorious. They were entertained west of Asukadera, and various kinds of music was performed and gifts were given. They were apparently quite the sight, as Buddhist priests and laiety all came out to watch.
Little is known for certain about the Hayato. We have shields that are attributed to them, but their association may have more to do with the fact that they were employed as ceremonial guards for a time at the palace. We do know that Southern Kyushu had various groups that were seen as culturally distinct from Yamato, although there is a lot of overlap in material culture. We also see early reports of the Kumaso, possibly two different groups, the Kuma and So, in earlier records, and the relationship between the Kumaso and the Hayato is not clearly defined.
What we do know is that southern Kyushu, for all that it shared with Yamato certain aspects of culture through the kofun period, for example, they also had their own traditions. For example, there is a particular burial tradition of underground kofun that is distinct to southern Kyushu. A great example of this can be found at the Saitobaru Kofun cluster in Miyazaki, which contains these unique southern Kyushu style burials along with more Yamato style keyhole shaped and circular type kofun. Miyazaki sits just north of the Ohosumi peninsula, in what was formerly the land of Hyuga, aka Himuka. This is also where a lot of the founding stories of the Heavenly grandchild were placed, and even today there is a shrine there to the Heavenly Rock Cave. In other words there are a lot of connections with Southern Kyushu, and given that the Chronicles were being written in the later 7th and early 8th centuries, it is an area of intense interest when trying to understand the origins of Yamato and Japanese history.
Unfortunately, nothing clearly tells us exactly how the Hayato were separate, but in the coming century they would both come under Yamato hegemony and rebel against it, time and again. This isn’t the first time they are mentioned, but it may be the first time that we see them as an actual people, in a factual entry as earlier references in the Chronicles are suspect.
Continuing on with our look at diplomacy during this period, the year 683 we see a continuation of the same patterns, with nothing too out of the ordinary. Same with most of 684 until the 12th lunar month. It is then that we see a Silla ship arrive with Hashi no Sukune no Wohi and Shirawi no Fubito no Hozen. They had both, previously been to the Tang empire to study, though we don’t have a record of them leaving for that or any other purpose. They are accompanied by Witsukahi no Muraji no Kobito and Tsukushi no Miyake no Muraji no Tokuko, both of whom had apparently been captured and taken by the Tang dynasty during the Baekje campaign. Apparently they had all traveled back from the Tang empire together to Silla, who then provided them passage to Yamato.
The timing of this suggests it may have had something to do with the changes going on in the Tang empire—changes that I desperately want to get into, but given that we are already a good ways into this current episode, I think I will leave it for later. But I will note this: Emperor Gaozong had passed away and his wife, Empress Wu Zetian, was now ruling as regent for her sons. Wu Zetian is probably the most famous empress in all of Chinese history, and while she held de facto power as a co-regent during her husband’s reign and as a regent during her sons’ reigns, she would actually ascend the throne herself in 690. Her reign as a woman during a time of heightened patriarchal tradition is particularly of note, and it leads us to wonder about the vilification that she received by the men who followed her rule. And I really want to get into all of that but, thematically, I think it better to wait. Those of you reading ahead in the syllabus—which is to say the Chronicles—probably know why. So let us just leave it there and say that the Tang was going through a few things, and that may explain why students were returning back in the company of former war captives.
A few months later, the Silla escort, Gim Mulyu, was sent home along with 7 people from Silla who had been washed ashore—presumably during a storm or other such event, again illustrating the dangers of taking to the ocean at this time. Perhaps related to that theme is the entry only a month later, which merely stated that Gim Jusan of Silla returned home. Gim Jusan was an envoy sent to Yamato in the 11th lunar month of 683. He was entertained in Tsukushi, and we are told that he returned to his own country on the 3rd month of 684. Now we are seeing an entry in the 4th month of 685 that this same person apparently returned home.
It is possible that something got mixed up, and that the Chroniclers were dealing with a typo in the records that made it seem like this took place a year later than it did. This was certainly an issue at this time, given all the math one had to do just to figure out what day it was. There is also the possibility that he returned on another embassy, but just wasn’t mentioned for some reason. The last possible explanation is that he somehow got lost and it took him a year to find his way back. Not entirely impossible back then, though I am a bit skeptical. Among other things, why would that note have found its way into the Chronicles in Yamato? While they were certainly using some continental sources, this seems like something they were talking about as far as him leaving the archipelago, rather than discussion of something happening elsewhere.
Speaking of happening elsewhere, I’m wondering about another event that happened around this time as well. In fact, it was while Gim Mulyu was still in the archipelago. For some reason the Yamato court granted rank to 147 individuals from Tang, Baekje, and Goguryeo. Interestingly, they don’t mention Silla. Furthermore, there is no real mention of any Tang envoys during this reign. In fact, there is hardly mention of the Tang dynasty at all. There is a mention of some 30 Tang men—captives, presumably—being sent to the Yamato court from Tsukushi. Those men were settled in Toutoumi, so there were men of Tang in the archipelago. But beyond that, there are only three other mentions of the Tang dynasty. One was when the students and war captives came back. Another was this note about giving rank to 147 individuals. Finally there is a similar record in 686, at the very end of the reign, where it is 34 persons who were given rank. This time it was to carpenters, diviners, physicians, students from Tang—possibly those who had just come back a year or so earlier.
So if there weren’t envoys from Tang, Goguryeo, and Baekje, who were these people and why were they being granted Yamato court rank? My assumption is that it was foreigners living in the archipelago, and being incorporated into the Yamato court system. Still, it is interesting that after the overtures by the Tang in the previous reign we have heard virtually nothing since then. Again, that is likely largely due to the conflicts between Tang and Silla, though now, things seem to be changing. The conflicts have settled down, and new rulers are in place, so we’ll see how things go.
Speaking of which, let’s finish up with the diplomatic exchanges in this reign. I’m only hitting some of the highlights here. First is the return from Silla, in the 5th month of 685, of Takamuku no Asomi no Maro and Tsuno no Asomi no Ushikahi. They had traveled to Silla in 684, and they did not come back emptyhanded. The new King of Silla presented them with gifts, including 2 horses, 3 dogs, 2 parrots, and 2 magpies. They also brought back the novice monks Kanjou and Ryoukan. Not bad, overall.
Then, 6 months later, another tribute mission came, but this one has an interesting—if somewhat questionable—note attached to it. It is said that the envoys Gim Jisyang and Gim Geonhun were sent to request “governance” and to bring tribute. This certainly go the court’s attention. They didn’t bring the envoys all the way to the capital, but they did send to them, in Tsukushi, Prince Kawachi, Ohotomo no Sukune no Yasumaro, Fujiwara no Asomi no Ohoshima, and Hodzumi no Asomi no Mushimaro. About three months later they send the musical performers from Kawaradera to provide entertainment during a banquet for the Silla envoy, and in payment some 5,000 bundles of rice rom the private lands attached to the queen’s palace were granted to the temple in gratitude.
The Silla tribute was then brought to the capital from Tsukushi. This time it was more than 100 items, including one fine horse, one mule, two dogs, a gold container inlaid with some kind of design, gold, silver, faint brocade, silk gauze, tiger and leopard skins, and a variety of medicines. In addition, as was now common, the envoys, Gim Jisyang and Gim Geonhun, apparently had personal gifts to give in the form of gold, silver, faint brocade, silk gauze, gold containers, screens, saddle hides, silk cloth, and more medicine. There were also gifts specifically for the sovereign, the queen, the Crown Prince, and for the various princes of the blood.
The court returned this favor with gifts to the envoys, presented at a banquet just for them, before sending them on their way.
A couple of notes. First off, it is interesting that they are entertained at Tsukushi rather than being invited to the capital, and I wonder if this was because the sovereign, Ohoama, wasn’t doing so well. This was all happening in 685 and 686, and the sovereign would pass away shortly afterwards. So it is possible that Ohoama just was not up to entertaining visitors at this time. Of course, the Chronicles often don’t tell us exactly why a given decision was made, only that it was. And sometimes not even that.
The other thing that seems curious is the mention of a request for governance. That almost sounds like Silla was asking to come under Yamato hegemony, which I seriously doubt. It may be that they were asking something along the lines of an alliance, but it is also possible that the scribes recording things for Yamato heard what they wanted to hear and so wrote it down in the light most favorable to Yamato laying claim to the peninsula.
Or perhaps I’m misunderstanding exactly what they were asking for. Maybe “governance” here means something else—perhaps just some kind of better relationship.
And with that, we’ll leave it for now. There is more developing in the next reign, but I think we want to wait until we get there. There are still a lot more things to cover in this reign before we move on—we haven’t even touched on the establishment of the new capital, on the various court events, not to mention some of the laws and punishments that this period is named for. And there is the minor issue of a rebellion. All of that will be dealt with. And then, after that, we get to the final reign of the Chronicles: the reign of Jitou Tennou. From there? Who knows.
It is the winter holiday season, so I hope everyone is enjoying themselves. Next episode will be the New Year’s recap, and then we should finish with this reign probably in January or early February.
Until then, if you like what we are doing, please tell your friends and feel free to rate us wherever you listen to podcasts. If you feel the need to do more, and want to help us keep this going, we have information about how you can donate on Patreon or through our KoFi site, ko-fi.com/sengokudaimyo, or find the links over at our main website, SengokuDaimyo.com/Podcast, where we will have some more discussion on topics from this episode.
Also, feel free to reach out to our Sengoku Daimyo Facebook page. You can also email us at the.sengoku.daimyo@gmail.com.
Thank you, also, to Ellen for their work editing the podcast.
And that’s all for now. Thank you again, and I’ll see you next episode on Sengoku Daimyo’s Chronicles of Japan.

References

Bentley, John R. (2025). Nihon Shoki: The Chronicles of Japan. ISBN 979-8-218634-67-4 pb
Aston, W. G. (1972). Nihongi, chronicles of Japan from the earliest times to A.D. 697. London: Allen & Unwin. ISBN0-80480984-4.

Episode 104: A Bloody Start to Golden Age

March 16, 2024 Joshua Badgley

A series of men on horseback, dressed in the round-necked collars typical of the Western regions with Chinese style hats, carrying flags with streamers. — Image of courtiers out on horseback dressed in the style of the Western Regions but with traditional ethnic Han headgear. From a Tang dynasty era tomb mural in modern Xian (ancient Chang’an). Photo by author.

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Who’s Who

Li Yuan

Li Yuan (aka Emperor Tang Gaozu) is the founder of the Tang empire. Likely related to families from the Western Regions that intermarried with ethnic Han to become elites during the chaotic Sixteen Kingdoms period, they made claims to a royal ancestor in the Western Liang. In the Sui they were an elite family providing military service. The “Li” family surname is a common one, with many different branches of the Li family.

Li Er

Aka Laozi, or “Old Sage”, a likely apocryphal name for the supposed author of the Dao De Jing and thus founder of Daoism. In all likelihood he is a fictional character or an amalgamation of many different philosophers whose ideas came to form the core of Daoist philosophy and religion. By the Sui dynasty there were some Daoists who believed that a person with the surname of “Li” would come to power and usher in a Daoist millennia. This may have made the Sui Emperor suspicious of anyone surnamed “Li” and was certainly used by Li Yuan to help justify his new dynasty.

Li Shimin

Li Shimin (aka [spoiler alert] Tang Taizong) was a son of Li Yuan and given the historical narrative he is portrayed as one of the key figures pushing Li Yuan to dethrone the Sui and take over. Eventually he maneuvered to put himself on the throne, and is generally regarded as having one of the best reigns despite all of the political bloodshed that seems to have occurred.

Li Jiancheng

The eldest son of Li Yuan, and one of his generals in his fight to form the Tang dynasty. He was named Crown Prince until the Xuwanwu gate incident.

Li Yuanji

Another son of Li Yuan, he was close with his brother Jiancheng and opposed the rise of his brother, Li Shimin.

Princess Pingyang

Pingyang was one of the daughters of Li Yuan, and the only full-blooded sister to Li Shimin, Li Jiancheng, and Li Yuanji. She was married to Chai Shao, an ally of Li Yuan, and during Li Yuan’s effort to take the throne she commanded an army, the “Army of the Lady”, in support of him and her brothers. She became the first female Tang General, and even when she and her husband were united on the field, they kept separate headquarters for their different forces.

Li Chengqian

Son of Li Shimin, and the Crown Prince. He was brought down by infighting with his brother, Li Tai

Li Tai

Son of Li Shimin, who was quite popular and so threatened Li Chengqian’s position as Crown Prince. The politics of the day, however, led to him being removed from court.

Li Zhi

Youngest son of Li Shimin, he would eventually come to the throne as emperor Tang Gaozong. He would rule with his wife, Empress Wu Zetian.

Welcome to Sengoku Daimyo’s Chronicles of Japan. My name is Joshua, and this is episode 104: A Bloody Start to a Golden Age
It was early in the morning on the fourth day of the sixth month of the ninth year of Wu De. Brothers Li Jiancheng, Crown Prince, and his younger brother, Li Yuanji, were more than a bit annoyed--Their brother had apparently slandered them to their father, the Emperor, claiming that they had had illicit relationships with his concubines. Although the accusations were false, they still had to come to the palace to clear their names. So they left the crown prince’s residence at the Eastern Palace and were traveling on horseback with a retinue of men through the private, forested royal park north of the city towards the Xuanwu Gate—the northern gate to the palace and to the great city of Chang’an.
As they approached Linhu Hall, they noticed something was afoot: there were soldiers in the park, headed their way. It was immediately apparent that the accusations had been a ruse, and their brother meant for more than just to tarnish their honor. As they fled eastward, back towards the Eastern palace, their brother, Li Shimin, came galloping towards them and called out to them. Li Yuanji tried to draw his bow, but couldn’t get to it in time, and Li Shimin shot and killed Li Jiancheng, their older brother and the crown prince.
Li Yuanji himself fell from his horse as he dodged arrows from the attacking troops, but Li Shimin also became entangled in the brush of the park and had to dismount. Li Yuanji ran up to his brother and tried to strangle him with his bow string, but soon he was chased off by reinforcements. Li Yuanji fled on foot to Wude Hall, where he was finally caught and struck down with arrows. Li Shimin’s forces struck off the heads of the two murdered princes, and took them to the Xuanwu gate, where opposing forces were still fighting. Seeing the heads of the two princes, it was clear that Li Shimin’s ambush was victorious, and the princes’ forces quickly dispersed.
Three days later, the victorious Li Shimin was instated as the new crown prince. Two months later, his father, Li Yuan, known to history as emperor Tang Gaozu, abdicated in favor of his son, who came to power as Emperor Taizong. This was the start of the Zhenguan era, which would come to be seen as a golden age in the history of the various Chinese empires.
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Alright, so as may be apparent, we are deviating a bit from our discussion of Yamato to look at some of the events on the continent. This is because the rise of the Tang dynasty would have an incredible impact on the Japanese archipelago. For one, it was the alliance between the Tang and Silla that would eventually mean the removal of Yamato and its allies from the Korean peninsula. In addition, however, the Tang dynasty’s access to the silk road and its grandiose government would become an exemplar for Yamato and many other polities who wished to demonstrate their political and cultural sophistication. Many of the laws and even court dress would mimic that of the Tang court—with a local flare, of course. In addition, the Tang dynasty brought a relative stability to the continent that would last for over two hundred years. Of course, none of that was known at the outset, and like many previous kingdoms, the Tang dynasty was born out of bloodshed.
We’ve mentioned several times how the Sui Dynasty was growing increasingly unpopular in the late 6th and early 7th centuries. Wars continued to cost money and lives, as did the giant public works projects of the periods - though the Grand Canal would be one of the greatest constructions of any age, uniting the Yangzi and Yellow River basins in myriad ways, powering the regions’ economies for centuries to come.
Into this Sui period came a man of the Li family named Yuan. We mentioned him back in episode 102, but I figured he could do with a little more backstory. Li Yuan’s family originated in the frontier regions. Official biographies had connected him to the founder of the Western Liang dynasty, and his family had served in various roles as the different northern kingdoms rose and fell. The Li family had been providing military service since the time of Yuan’s great-grandfather, and Li Yuan himself had been serving since the early 600s. He was made a general and placed in charge of the Dongguang pass in the Taihang mountains. There, he largely stayed out of the limelight.
At one point, he was summoned to the palace and rather than going he feigned illness, instead. You see, around this time there was a prophecy flying around that someone with the surname of Li would try to take the throne from Sui Emperor, Emperor Yang, so it may have been in Li Yuan’s best interest to avoid the court and anything that could draw Emperor Yang’s suspicions. He continued to do everything in his power to make himself seem unthreatening, even as rebellions were breaking out across the Empire.
In 614, the Sui army was defeated by Goguryeo, and the Sui court was plagued by numerous uprisings. Li Yuan may have sat it out if it weren’t for his son, Li Shimin. Like many youthful individuals, Li Shimin was less than invested in the current administration. He and several of his close acquaintances began to scheme behind his father’s back, with plans to join the other uprisings and hope to take a piece of the pie. Eventually, they blackmailed Li Yuan into marching on the capital of Daxingcheng in 617, threatening to expose several illicit relationships from his time at the court—relationships that would have surely put him at odds with the Emperor. At the same time, Emperor Yang had fled to the southern capital along the banks of the Yangzi River, but his son and heir, Yang You, was still in the capital. Li Yuan marched on imperial city of Daxingcheng, near the ancient capital of Chang’an, claiming that he was coming to protect the young heir.
Taking control of the capital city put Li Yuan at odds with imperial forces, who did not necessarily accept Li Yuan’s altruistic claims. Li Yuan and his sons, including Li Shimin and Li Jiangcheng, were drawn into fighting. Even Li Yuan’s daughter, Pingyang, the wife of general Chai Shao, contributed to the war effort. She personally raised an army and led it into battle, becoming the first female general of what would be known as the Tang dynasty.
In 618, Emperor Yang of Sui was assassinated by another general, Yuwen Huaji, and the throne passed to his son, Yang You, known as Emperor Gong of Sui. However, Li Yuan pressured the newly made Emperor Gong to yield the throne to him. Since Li Yuan had inherited the title “Duke of Tang” from his paternal line, he used that as the name of his new dynasty, and became known as Tang Gaozu—the High Founder of Tang.
It wasn’t enough to simply take the throne, though. There were still many other warlords looking to take his place. After all, unification had only come about some thirty or forty years prior. Up to that point, there had been numerous, often competing kingdoms, especially in the north. It was quite possible that the Sui dynasty was just a fluke, and most people no doubt expected the empire to fall once more into chaos.
Still, although he definitely had to back it up with military might, often led by his sons and close confidants, Li Yuan went about the process of enacting his sovereignty. This included various state rituals, as well as a reform of the administration. For one thing, they renamed the capital. Daxingcheng had been built nearby the ancient capital of Chang’an, and so they renamed Daxingcheng to the ancient name of Chang’an.
In addition, he sought out various supernatural portents. He also enjoyed the support of various Daoists, who believed that the founder of Daoism, Laozi, was from the Li family. There was a belief at the time that a messianic ruler from the Li family would bring about the Daoist millennium. And to better understand that, it may be useful to understand a little bit about Daoism.
Daoism, first and foremost, is one of the more well known religions to come out of China, and often is found side by side what would seem to be its polar opposite, Confucianism. However, the two have more in common than one might at first assume.
The believed founder of Daoism is known as Laozi, though some later sources, including the Qin dynasty “Records of the Grand Historian”, by Sima Chen, would claim for him the name Li Er. Laozi was said to have been a scholar who abandoned the world, and as he was leaving the empire for parts unknown, an astute guard recognized him and requested that before he left that he write down his accumulated wisdom before he would let the old sage leave. That became the work known as the Dao De Jing, or the Classic of the Way and Virtue.
The opening of the Dao De Jing is rather famous:
Dao ke Dao, feichang Dao.
Or, according to one translation: The Dao that can be known is not the eternal Dao.
However, no English translation truly does the original justice.
Traditionally, Laozi is said to have been a contemporary of Confucius, and some of the earliest writings on him, in the Warring States period writings of Zhuangzi, often show Confucius in awe of Laozi. That said, most tend to agree that Laozi himself likely never existed, and that the Dao De Jing was assembled over the years from various poems and sayings that fit with the general theme of formlessness and a general concept of following the Way, a rather ill defined concept of natural order, one which humans are constantly pushing against, often to our detriment.
Truth is that both Confucius and Laozi—or whomever compiled the Dao De Jing—wrote about a thing called the “Dao” or “Way”. Confucius was often talking about the “Way of Heaven”, describing an ordered universe where balance was kept by everyone remaining in their proper place, creating a series of rules around strict, hierarchical relationships, such as those between a father and son, or the ruler and subject. According to Confucian thought, as long as things on Earth were properly ordered, that order would be reflected in the Heavens, and all of creation would be ordered as well.
In Daoism, it is much less about attempting to order the universe, but rather about giving in to your natural place in the universe. This is a much simplified version of both religions, but in general, where Confucianism tended to see serving at court as a virtue, Daoism tended to reject official life. For many court officials, they would embrace Confucian ideals in their official lives, but often seek out Daoist pleasures in their free time.
Religious Daoism, where it became more than simply a philosophical ideal, appears to have coalesced around the Han dynasty. There are Daoist temples, though in this instance it is often intertwined with many other Sinitic philosophies and beliefs. Thus things like the Queen Mother of the West and the Peaches of Immortality could be included in Daoist practice. Things like the Yijing, the Book of Changes, and various divination methods could also be included.
In many cases, “Daoist” seems to be used less to refer to a strict adherent to the philosophy of the supposed Laozi, and more as a general catchall for various folk beliefs. Thus many people see the images of the Queen Mother of the West on Han Dynasty mirrors imported to Japan as evidence of a Daoist influence on the archipelago, while others note the lack of the further panoply of religious accoutrements that we would expect if it was truly a “Daoist” influence, and not just a few folk beliefs that made their way across the straits.
However, by the time that Li Yuan was coming to the throne there was a thriving Daoist community in the Sui and burgeoning Tang dynasties, and if they believed that Li Yuan was an incarnation of Laozi—or at least a messianic descendant—who was he to dissuade them of such a notion?
Li Yuan reached back into the past in other ways as well. For one, he would reinstitute the Northern Wei “equal-field” system of state granted land, along with a system of prefectures and districts to help administer it. This was largely an effort to help fill up the coffers, which had been emptied by the Sui and constant warfare, while also emphasizing state ownership of land, with individuals being mere tenants. It also helped bring back into cultivation lands that had long lain fallow, often due to the constant fighting of the previous centuries.
In 621, Li Yuan ordered the minting of new copper coins to help stabilize the currency. Later Sui currency had been devalued by numerous forgeries as well as official debasement—mixing in less valuable metals to make the coins, while attempting to maintain the same denominations as before. These new coins were meant to restore faith in the currency, but shortages would continue to plague the dynasty throughout its history, leading to the use of cloth as a common medium of exchange and tax payment, something that was also common on the archipelago, along with other goods, in lieu of rice or money.
By 624, Li Yuan also announced a new legal code based on the old Han era code, although this was quickly expanded, since the needs of the code from the 3rd century
Now initially, for all of their claims to the entire geographic area of the Sui dynasty, the newly established Tang dynasty really only had effective control over a small are of Guanzhou—the area around Chang’an itself. Li Yuan hadn’t been the only one to rise up, and just because he had declared himself the new emperor didn’t mean that the other warlords were just giving up. It wasn’t like they had reached the end of a football match and everyone was now just going to go home.
And so he and his sons found themselves campaigning for at least the next five years, and that was against the active threats. Plenty of local elites, especially along the Yellow River basin, simply opted to hole up in their fortified settlements. After all, they had no guarantees that this new Tang dynasty would last longer than any of the others in the past several centuries. Often these local elites came under nominal vassalage of the Tang—and probably any other warlord that showed up—but in reality, based on how we see the Tang administration at work, it seems they were primarily left to their own devices, at least early on. After all, Li Yuan and his sons had plenty of active threats to worry about.
And it was definitely his sons who bore the brunt of the work. Li Jiancheng, the eldest son, who would eventually be named Crown Prince, and Li Shimin each took charge of various troops against the threats to the new Tang empire. And they were, for the most part, successful. They eventually brought a majority of the former Sui territory under their control, such that by 623 internal resistance had begun to wane, and by 624 the situation was largely under control.
At least internally. To the north and west there was another threat: The khaganate of the Göktürks.
Now for many people, if you hear “Turks” you might immediately think of the Ottomans in the region of modern Turkiye. However, that is not where the Turkish people originated from. In fact, the first mention of Turkic people appears to be out of the Altai mountains, in modern Mongolia, from around 545. They appear to have been a nomadic group, as were many of the people of the steppes of central Eurasia. By 551, only a short time after they were first documented by outside groups, they had established the Göktürk, or Celestial Turk, Khaganate, based in the Mongolian plateau. From there they expanded in the 6th century, at one point spanning from the Byzantine and Sassanid Persian empires in the west all the way to the kingdoms and empires of the Yellow River basin in the east.
Many of the ethnic Han kingdoms that clashed with the Göktürks instituted practices of basically paying them off to prevent raids and invasions of their territory. Shortly after the founding of the Sui dynasty, the Turkic Khaganate split in two, after the death of the khagan, and so the Sui and Tang were actually dealing with what we know as the Eastern Turkic Khaganate. They were known to the ethnic Han people as the Thuk-kyat people, a term that today is often transcribed as Tujue, due to the shift in Sinic pronunciation over time. “Tujue” is often how you’ll see it rendered in sources referencing Chinese documents.
The Eastern Turkic Khaganate remained an issue for the Sui and Tang dynasties. Initially, when the uprisings against the Sui began, the Göktürks actually pulled back for a bit, hoping to allow the internal conflicts to weaken their eastern neighbors, but as they saw the direction things were taking, with the Tang dynasty solidifying their power, they began to launch invasions and harass the border, forcing the Tang dynasty to send troops. Initially Li Yuan attempted to by off the Eastern Turks, as previous dynasties had done, but while they were happy to take his money, the invasions did not stop.
Eventually, things got so bad—and the internal conflicts were in a stable enough state—that Li Yuan, decided to send a force against them. A fairly straightforward decision, supposedly, except, well…
Throughout all of this conflict, Li Jiancheng and Li Shimin had been building up their own influence. Li Jiancheng, as the eldest son of Li Yuan, was the Crown Prince, but Li Shimin had built up his own power and influence, to the point that Li Jiancheng and his other brother, Li Yuanji, were starting to look at how they could take care of him before he got so powerful and popular that Li Yuan was tempted to make him Crown Prince instead of Jiancheng. At one point, Li Yuanji proposed inviting Li Shimin over and just having him killed, but Li Jiancheng balked at such direct and obvious fratricide.
Instead, Li Jiancheng reportedly pushed his younger brother into positions that would possibly get him killed, but Li Shimin continued to succeed, thwarting his brother’s plans and growing his own fame and power in the process.
Finally, Li Jiancheng decided to take a different approach, and he suggested to his father that the army to defend the empire against the Turks should be led by none other than Li Yuanji. This would mean moving a large portion of the army out from under Li Shimin’s command to his brother, Li Yuanji, who would also accrue much of the fame and respect if he proved successful. This was a huge blow to Li Shimin, who had heard rumors that his brothers were out to get him.
Before setting out on such a campaign, it would have been expected that Li Shimin and his other brothers turn out to wish Li Yuanji success in his campaign. That would have put Li Shimin in an extremely vulnerable position, where he could be arrested or even killed, without the usual protection of his own forces. And so Li Shimin decided to be proactive.
Before the campaign could set out, Li Shimin submitted accusations against Li Jiancheng and Li Yuanji that they were having illicit relations with the concubines of their father, the emperor. This got Li Yuan’s attention, and he called both of his sons back to the palace to investigate what was going on. This is what led to that fateful incident known as the Xuanwu Gate Incident. Unbeknownst to Li Yuan or his other sons, Li Shimin had forces loyal to him take over the Xuanwu gate the night before Li Jiancheng and Li Yuanji were to have their audience. Ideally, at least from Li Shimin’s position, they would have both been assassinated at Xuanwu gate, but as I noted at the start of the episode, things did not go exactly to plan. There were several moments where a single stray arrow could have completely changed the course of things, but in the end, Li Shimin was triumphant.
As the fighting was going on, Li Yuan heard the commotion. Apparently he had been out in a boat on the lake in the palace enclosure—and yes, you heard that right, the palace included a lake, or at least a very large pond, such that the emperor could partake in a lazy morning upon the water. When he heard the commotion, he guessed that the tensions between his sons must be at the heart of it, and even surmised that Li Shimin was likely behind it. He got to shore and surrounded himself with courtiers, including known comrades and acquaintances of his son, Li Shimin.
Eventually, a representative of Li Shimin arrived, and he told the court that Li Jiancheng and Li Yuanji had risen up in rebellion, but that Li Shimin had had them both put to death. With Li Shimin’s troops literally at the gates of the palace, and Li Jiancheng and Li Yuanji not exactly able to defend themselves, the accusation stood. Several days later, no doubt under pressure from Li Shimin, Emperor Tang Gaozu, aka Li Yuan, officially made Li Shimin the Crown Prince. Two months later, he abdicated in favor of Li Shimin, who came to power as Tang Taizong in 626 CE. Li Yuan himself took on the title of Retired Emperor, and continued to live life in the palace, but with a much reduced impact on the political affairs of the empire.
Li Shimin himself took the reins of power immediately, and set about cementing his rule in several different ways. First off, to offset his particularly unfilial method of coming to the throne, Li Shimin engaged in performative Confucian virtue signaling. He played the part of the dutiful son, at least in public, providing for his retired father and attempting to act the part of the sage ruler. This was somewhat impeded by the cold relationship he and his father appear to have maintained after that point—apparently killing your siblings and forcing your father to abdicate are not exactly the kinds of bonding experiences that bring a father and son closer together. Still, that was mostly kept in the confines of the private areas of the palace. Publicly, he gathered accomplished military and civilian officials, and made sure to seek out their opinion.
The era of emperor Tang Taizong is known as the Zhenguan era, lasting from roughly 627 to 649, and it was considered to be synonymous with good governance by later historians and philosophers. Granted, most of the examples of good governance only lasted long enough for Li Shimin to establish himself in his position as emperor. Once he had solidified his power, and felt secure in his position, his rule changed to a more traditional and authoritarian model.
Regarding the threat of invasion from the Eastern Turkic Khaganate, Li Shimin met the Turks at the Wei River, where he accused them of invading Tang territory and demanded restitution. The Turks were impressed enough by his forces that they agreed to settle, offering thousands of horses and other goods, but Li Shimin declined their attempts to make it good. Eventually, Li Shimin supported some of the more disaffected members of the Turkic Khaganate in a coup, and by 630 the Eastern Turkic Khaganate and their gateway to the Silk Road was under Tang dynasty control. The Turks granted Li Shimin the title of Heavenly Khagan, placing him over both the Tang dynasty and the Eastern Turkic Khaganate.
He then went about resettling surrendered Eastern Turks while sending agents to foment rebellions and civil wars in the Western Turkic Khaganate, which controlled the area from Yumenguan, the Jade Gate, west of Dunhuang, all the way to Sassanid Persia. Dunhuang is an oasis city at the western end of the Gansu corridor, and the Jade Gate was considered to be the entry way to the Western Regions.
As Emperor Taizong, Li Shimin placed a puppet Khagan on the throne of the Western Turkic Khaganate in 642, and then sent numerous campaigns against the Western Turks in a series of wars against those who hadn’t simply given in to his will—first against the kingdom of Gaochang, a city cut from the rock of a giant plateau, and then on to the cities Karashr—known today by the Chinese name of Yanqi—and on to Kuqa. The campaigns would outlive Emperor Taizong himself, and the khaganate was completely annexed by 657, giving the Tang dynasty complete mastery over at least one part of the silk road out to Sassanid Persia and the west.
This would be huge, not only for the Tang dynasty, but for all of the cultures on the far eastern end of that silk road. There would be an increase in material and cultural items that traversed the routes. Chinese court dress even came to incorporate Turkic and Sogdian dress and clothing styles, which would eventually make their way to the Japanese archipelago, where they would take the tailored, round-necked collar designs for their own, eventually changing them, by the late Heian era, into their own distinctive garments.
It also opened a route to India for those Buddhist scholars who wished to go and study at the source, such as it was.
As for Emperor Taizong, by the 630s, with his title as Heavenly Khagan, Li Shimin seems to have stopped worrying about performative Confucian virtues. He took more direct control, and more often would quarrel with his ministers on various issues. In 637 he also reworked the Tang legal code, further refining the law.
At the same time, there were family matters he also had to attend to. It seems like father, like son—while Li Shimin’s eldest son, Li Chengqian was the Crown Prince, Shimin appeared to favor another son, Li Tai. As such, these two brothers became bitter rivals. Li Chengqian started to worry about his position as Crown Prince, and he consulted with some of his close advisors and confidants. Their solution was not to take his brother out of the picture, but rather to take his own father out of the picture. And so Li Chengqian reportedly entertained the idea of overthrowing his father, Emperor Taizong, at least as a thought experiment.
And really, at this point, I have some suspicions that Li Shimin might very well have been a bit of an absentee father, because does Chengqian even know whom he is talking about trying to coup?
Sure enough, Li Shimin learned about his sons extracurricular activities in 643 and he was less than happy with all of this. Li Chengqian’s defense, appears to have been that they only discussed it, they never went through with anything. As such, some of Chengqian’s conspirators were put to death, but Chengqian himself was simply reduced in rank to commoner status, stripped of his titles. When he died a few years later, though, Li Shimin had him buried as a Duke, and a later emperor would even posthumously restore his rank as an imperial prince.
Of course, the question came up as to just what to do about the Crown Prince. Li Tai seemed the obvious choice, as he had clearly impressed his father with his apparent talent and skill. However, it was pointed out that Li Tai’s competition with his brother is what had led to Chengqian’s fear and thoughts of rebellion in the first place. He hadn’t exactly been the model of filial virtue. In fact, if he hadn’t been scheming, none of this would have taken place. And so it was decided to pass him over and to create Li Zhi, a younger brother, as Crown Prince. Li Tai himself was demoted, though only down to a minor princely state, and exiled from Chang’an, making it extremely difficult for him to influence politics. Records of the time suggest this was an extremely difficult decision by his father, but one that he considered necessary for the responsible administration of government.
All of this was taking place in the early 640s, but it wasn’t the only thing that Li Shimin had on his mind. With the Turkic threat being handled in the west, the emperor let his ambitions get the better of him, and he turned his eyes towards Goguryeo, to his northeast. Previously, Emperor Yang of Sui had failed in his campaigns against Goguryeo, and that was one of the things that had led to the popular uprisings and rebellion that had taken down the dynasty. Now, Emperor Taizong seemed determined to succeed where the prior dynasty failed.
And so the Tang dynasty allied with the kingdom of Silla, hoping to force Goguryeo into a war on two fronts. Silla was already expanding on the Korean peninsula, and a natural ally for the Tang dynasty. Furthermore, they were far enough away that they weren’t an immediate threat if they decided to go back on their part of the deal.
Unfortunately for the Tang, these campaigns in 645 were not exactly a cake walk, and they handed Li Shimin his first defeat since the attempts to unify everyone under the Tang dynasty. Not exactly a great look. Relations with Goguryeo were normalized for a brief time, but then Emperor Taizong decided to give it another try. They started gathering ships and men for another invasion, no doubt having played out why they had lost the previous go round and hoping that it would be better in round two.
The invasions, however, would come to naught. As it was being prepared, Tang Taizong grew ill. He called off the invasion, and then, in 649, he passed away. His youngest son, the Crown Prince Li Zhi, came to the throne as Emperor Gaozong. The reign of him and his wife, Empress Wu Zetian, would have an enormous impact on the rest of the 7th century.
Through all of this fighting, bloodshed, and politics, this set the stage for the future of the Tang dynasty, which would once again place the area of modern China in the center of what many considered to be the civilized world. Besides being a center for Buddhist, Confucian, and Daoist religion, Chang’an became an extremely cosmopolitan city, with Sogdian and Turkic traders visiting the markets and establishing themselves in the city. Many foreign families would adapt over time, integrating into the culture of their new home.
These foreigners brought other ideas with them as well. Zoroastrianism, a Persian religion, may have come eastward much earlier, but in the 6th and 7th centuries, both Manichaeism and Christianity—at least an eastern version of Christianity—had made inroads into the capital of Chang’an. Manichaeism would have its ups and downs, especially in conflict with Buddhism. Christianity, on the other hand, was not necessarily the Christianity of Rome, but typically connected with the Syriac church that existed in the Persian empire, where it was a decidedly minority religion. Later proponents of Rome and the Latin rite would connect it with the supposed heresies of Nestorius, referring to the Church of the East as Nestorian Christianity, but this is not a term they would have used for themselves. These religions kept some of their traditions, but also incorporated some aspects of the culture of their new home, such as the use of rice in place of bread in some rituals.
This was an exciting time, and the court at Chang’an was fascinated with various customs of the Western Regions. Music, clothing, and even pasttimes were influenced by contact with the western lands. This would, in time, be passed on even to the archipelago. For instance, the pipa was an instrument that had origins in the Western regions. It is found in the area of modern China in at least the Northern Wei dynasty, but no doubt it grew more popular over time. A version of this same instrument traveled west to Persia, where it became the oud, and further on to Europe, where it became the famous lute. In the archipelago, the pipa became the Biwa, and while we can never be one hundred percent certain about early music, we have instructions from the Tang dynasty on music for the pipa, and Tang dynasty and early music, along with music from Goguryeo, came over to the Japanese courts in the form of gagaku, traditional Japanese court music, in the early 8th century.
Moving forward in our story about the Japanese archipelago, we are going to see more and more about the kentoushi, the Japanese embassies to the Tang dynasty, and just what they would bring back. At the same time, we will also see the reaction of the court to the alliance between the Tang and Yamato’s largest competitor on the Korean peninsula, Silla. That alliance, which outlived emperor Taizong and even the king of Silla, would dramatically shift the balance of power on the peninsula and in all of northeast Asia.
But we need to get there, first. For now, let’s move our gaze back across the waters to the archipelago, where Prince Tamura was about to take the throne, later becoming known as Jomei Tennou. Of course, he was dealing with his own politics, especially regarding the Soga house and the powerful hold they had over government. Next episode we will get back to just what was happening over there.
Until then, thank you for listening and for all of your support.
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Thank you, also, to Ellen for her work editing the podcast.
And that’s all for now. Thank you again, and I’ll see you next episode on Sengoku Daimyo’s Chronicles of Japan.

References

Lewis, Mark Edward (2009). China’s Cosmopolitan Empire: The Tang Dynasty. The Belknap Press of Harvard University Press, Cambridge, Massachusetts / London, England. ISBN 978-0-674-03306-1
Benn, Charles (2002). China’s Golden Age: Everyday Life in the Tang Dynasty. Oxford University Press. ISBN 0-19-517665-0

Silla

Goguryeo

Tamna

Tang Empire

Mishihase

Non-Yamato Cultures on the Archipelago

Hayato

Tanegashima and Yakushima

Rough Transcript

References

Who’s Who

Li Yuan

Li Er

Li Shimin

Li Jiancheng

Li Yuanji

Princess Pingyang

Li Chengqian

Li Tai

Li Zhi

Rough Transcript

References