Chapter One: The Mongols are coming!
An island on a volatile border
This particular tale occurred one year before the outbreak of the great famine of Ōei. At the time, the island of Tsushima (対馬, now Tsushima City, part of Nagasaki Prefecture) functioned as a sort of ‘gateway to the west’, linking together both northern Kyushu with the Korean peninsula. Its total surface area amounted to 710 square kilometres. When one looks at a map of this large island, which unfolds gradually in both a northerly and southernly direction, one notices that it is fairly broken up in the central section, effectively dividing the island into two. In the middle of this area, on a peninsula known as Ozaki located in Asō bay, lay a fishing village known as Tsuchiyori (土寄). On the 20th day of the 6th month of the 26th year of Ōei (or 1419), around 10 or so ships appeared in the waters off the coast located near the village. (12)
Upon seeing the silhouette of the ships on the horizon, the villagers thought that they were friendly vessels returning to port, and so collecting up both sake wine and victuals, took these to the coast and waited for the vessels to arrive. However, it soon became clear that these vessels weren’t those of a friendly neighbour. The ten or so ships that the villagers had first seen soon grew in number, so much so that they eventually constituted an armada of 227 vessels. The vessels were heading straight towards the village, where it was obvious that they planned to make landfall. Yet who on earth did they belong to? In a panic, the villagers threw away the food they had brought with them and their belongings and scattered in the direction of the mountains behind the village. (13-14)
Fifty or so villagers decided to test their mettle and so took to their boats and headed out in the direction of the armada. Their vessels were soon reduced to matchwood by the mysterious armada, which then laid anchor off the coast and despatched smaller vessels. These vessels disgorged troops one after another, who quickly dispersed into the island’s interior. These troops seized 129 vessels belonging to the villagers, and after judging that 20 or so vessels were still suitable for use, burned the remaining boats. They also set fire to 1,939 houses belonging to the villagers, and destroyed their crops. During the course of their attack, the invading army killed 114 villagers and took 21 hostages, and managed to occupy one section of the island. (14)
The invading army then spent the next few days crossing from Asō bay to attack the village of Kofunakoshi (小船越) which it eventually seized. In a short space of time, the invading army had become an army of occupation, managing to divide both the southern and northern parts of the island with a majority of their strength focused in Asō bay. On the 26th day of the 6th month (or the 27th day of the 7th month according to the Gregorian calendar), the invading army concentrated in troops in the Nii gun region not far from Asō bay. These troops were divided into three separate armies, with the largest heading off in the direction of the north of the island. At the time, the rulers of Tsushima island, the Sō (宗) family, were based in the north at Sakaura (佐賀浦) bay, which functioned as a de facto capital. Quite possibly the largest section of the invading army planned to march north to force Sakaura to capitulate, and consolidate their control over the island. (14)
Yet it was at this point that the native forces on Tsushima island began to resist the army of invasion. The corps of troops that constituted the left wing of the invading army was surprised by an ambush laid by the Tsushima forces, which resulted in around 110 deaths among the invasion force. This initial success has been relayed by islanders to their descendants in florid terms under the title of “the Battle of Nukadake” (糠嶽合戦). This victory became a catalyst for islander resistance to the invading army, who then set about creating a more organised defence from the interior of the island. (15) Meanwhile, the right wing of the invading army also encountered fierce resistance from islanders, so much so that the central part of the army had to forego landing at Nii gun in order to deal with the threat to its right flank. (15)
There were no further major battles between the native islanders and the invading army, who then settled into a series of small tit for tat skirmishes while moving from one part of the island to another. Eventually the Sō were able to broker a truce with the invasion force, which withdrew from Tsushima at the beginning of the 7th month. (15)
The details of the events above are an overview of an attack carried out against a border island by the vessels belonging to a foreign nation. Those who are particularly knowledgeable about history will have already correctly surmised that the incident referred to here is the “Foreign Piracy of the Ōei Period” (応永の外冦), which is an example of the type of internecine warfare that occurred in the border islands during the medieval era. The “mysterious armada” that attacked the island was no gang of lawless seafarers, but was a legitimate army organised and despatched from the Kingdom of Li on the Korean peninsula. (15)
At the time, the Korean monarchy had suffered no end of strife at the hands of gangs of pirates known as “Wakō” (倭寇) that plied the East China Sea. As such, the Li dynasty had taken it upon itself to launch an attack against what was regarded as the heart of the Wakō territories, the island of Tsushima (in Korea, the incident is known as the “Suppression of the Eastern Barbarians” or 己亥東征). The Korean army that landed on Tsushima did not simply burn down the villages on the island, but also freed 31 Chinese men and women who had been abducted by the villagers. The viewpoint of the Korean monarchy that regarded Tsushima as a hotbed of piracy was correct, as it is difficult to argue with the fact that a lack of arable land on the island forced the islanders to conduct raids on the continent in order to steal both property and people. The leader of these pirate gangs, who controlled the straits and who was the first to suffer his house being burnt down, was the head of Tsuchiyori village, Sōda Saemon Tarō (早田左衛門太郎). (16)
Sōda, together with other prominent pirate leaders, hid their fleets in the bays and inlets in the centre of the island, and from their base at Tsuchiyori and Kofunakoshi embarked out across the East China Sea, striking terror into the hearts of the inhabitants of the mainland and the Korean peninsula. One year before the invasion took place, the head of Tsushima island Sō Sadashige (宗貞茂) died of illness, so that at the time of the invasion the head of the island forces was the infant Tsutsu Kumamaru (later Sō Sadamori, or 宗貞盛). Given that the previous lord of Tsushima was dead and his successor not yet ready to rule, Sōda Saemon and other kokujin on the island moved to separate themselves from the control of the Sō family, and so began to engage in piracy on an hereto unforseen level. (16)
Although this invasion saw deaths in battle in the hundreds, fortunately the conflict itself lasted no more than a week, and was predominantly confined to the area around Asō bay. As such, though it was certainty a problem to those involved, it was no different to the many other forms of regional strife that occurred across the country during the medieval period. However, to those living far away in the capital that got wind of the incident, it certainly couldn’t be treated so lightly. (17)