Among the defenders was a samurai named Takezaki Suenaga. He left the only contemporary pictorial records of the Mongol invasion on two scrolls that he commissioned later in order to petition the government for a reward for his services. The scrolls, known as the Moko Shurai Ekotoba, are one of Japan’s great cultural treasures.
Dating to around 1294, the first scroll unrolls to reveal samurai in armor riding off to battle in 1274. The battle was unequal not only in numbers but in weapons and tactics. Mongol weapons were more advanced than those of the samurai: their bows had greater range, firing poisoned arrows, and they also had explosive shells hurled by catapults. In battle, the Mongols advanced en masse and fought as a unit, while the samurai, true to their code, ventured out to fight individual duels. In a week of fighting, the Japanese were slowly forced to give way. The scroll shows the Mongol forces firing arrows as horses and men fall, and Suenaga himself bleeding and falling from his horse as a bomb explodes in the air above him. The Japanese retreated, falling back to Daizafu, the fortified capital of Kyushu. The Mongols sacked and burned Hakata, but time was running out for them: Japanese reinforcements were pouring in from the surrounding countryside. The Mongol commander was wounded, and the sailors aboard the invading ships were wary of an incoming storm that threatened the fleet in its crowded anchorage.
On October 20, the wind shifted, and a number of Mongol ships dragged anchor, capsizing or driving ashore. In all, some three hundred ships and 13,500 men were lost. Battered and depleted, the surviving Mongols retreated to Koryo, leaving the Japanese to cheer their salvation thanks to the storm that had ended the invasion.
Knowing that the Mongols would be back, the bakufu ordered the construction of defenses at Hakata Bay. In a six-month period in 1276, laborers erected a 12½-mile, 5- to g-foot high defensive stone wall set back from the beach. The samurai also organized their vassals into a compulsory defense force and requisitioned small fishing and trading vessels for a coastal navy.
Kublai Khan renewed his demand for Japan’s surrender in June 1279, just as the last remnants of the Sung dynasty in China crumbled before the Mongol onslaught. The bakufu cut off the heads of the Mongol envoys as they landed. Furious, Kublai Khan ordered Koryo to build a new fleet of nine hundred ships to carry ten thousand troops and seventeen thousand sailors; and in China, he ordered a fleet of nearly thirty-five hundred ships and an invasion force of a hundred thousand Chinese warriors to prepare for battle.
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Kublai Khan directed the two fleets — the Koryo Eastern Route Division and the Chinese Chiang-nan Division — to rendezvous at Iki Island to co-ordinate their attack. The Eastern Route Division sailed first on May 3, 1281, retaking Iki on June 10. Without waiting for the arrival of the Chiang-nan Division, the impatient commanders of the Eastern Route Division sailed to Hakata Bay. Takezaki Suenaga’s second scroll depicts the second invasion, showing him riding off to war, passing in front of the newly built stone wall at Hakata Bay as other samurai sit atop the wall and wait for the enemy. The stone walls thwarted the Mongols, who pulled back to occupy an island in the middle of the bay. The Japanese used their small navy to cut into the Mongol fleet, with armed samurai springing onto the enemy ships and killing the crews and soldiers. The second scroll also shows Suenaga in a small boat, running up alongside larger Mongol ships and fighting his way forward to cut the throats of the crew in deadly hand-to-hand combat. The brushstrokes of the artist convey the ferocity of the fighting, with blood spurting as sharp blades and arrows cut down men. The paintings are a graphic testimony as to why the badly mauled Eastern Route Division retreated to Iki Island with the Japanese in pursuit.
The Chiang-nan Division finally sailed in June and met up with the Eastern Route Division at the small island of Takashima, 30 miles south of Hakata. The Japanese fought the combined Chinese and Mongol forces in a running two-week battle throughout the rugged countryside. The crews of the invading ships chained their vessels together and constructed a plank walkway, forming a massive floating fortress in preparation for the inevitable waterborne assault by the small defense craft of the Japanese.
The Japanese ships, some of them filled with straw and set on fire, attacked the Mongol fleet but were unable to do much harm. As the story was later told, the Japanese beseeched the Goddess of the Ise Shrine for another storm to help them, and their prayers were answered. The legend states that “A green dragon had raised its head from the waves” and “sulfurous flames filled the firmament.” Driving rain, high winds and storm-lashed waves smashed into the Mongol fleet. Thousands of ships sank, drowning nearly a hundred thousand men. Mongol troops stranded on the beach, demoralized and cut off from escape, were rounded up and executed. The shores were strewn with debris and bodies; according to a modern Japanese history, “a person could walk across from one point of land to another on a mass of wreckage” at the entrance to Imari Bay. Kublai Khan abandoned his dreams of a Japanese conquest in 1286 when he abruptly cancelled the preparations for a third invasion.
Interestingly, Suenaga’s scrolls and the handful of Japanese documents from the 1281 invasion do not depict or mention a storm. Critics of the scrolls deride them as the work of a “self-aggrandizer,” while others point to persistent myth-building by Japan’s military and political leaders that glorified the emperor as a god and celebrated Japan’s divine protection and status. (Eventually, this led to a series of wars of conquest that greatly expanded the Japanese empire from the 1870s through the early 1940s.) But the Venetian adventurer Marco Polo, who allegedly spent several years in Kublai Khan’s court, wrote an account of the Mongol invasion in which he mentioned the storm that destroyed it:
And it came to pass that there arose a north wind, which blew with great fury, and caused great damage along the coasts of that Island, for its harbors were few. It blew so hard that the Great Kaan’s fleet could not stand against it. And when the chiefs saw that, they came to the conclusion that if the ships remained where they were, the whole navy would perish. So they all got on board and made sail to leave the country. But when they had gone about four miles they came to a small Island, on which they were driven ashore in spite of all they could do, and a great part of the fleet was wrecked and a great multitude of the force perished.
Given the prominent place of the story of the kamikaze in Japanese history, who knows where the truth lies? For a handful of young archeologists, the truth lies in the remains of the events, which now lie beneath the waters of Japan’s coast.
The beautiful views of Hakata and Imari bays and their gentle waves belie the violence of the storms that are said to have twice destroyed the Mongol fleet, as well as the tremendous battles waged on their shores in 1274 and 1281. Apart from memorials and monuments, few physical traces of the invasion remain on the land other than a handful of reconstructed sections of the stone wall in the heart of modern Fukuoka. Some scholars do not believe that the stone anchor weight at Hakozaki Shrine comes from the Mongol invasion; they think that it is one of many similar anchors lost on the bay bottom during the centuries Hakata Bay was an active port, because no other evidence — such as weapons or broken hulls — has ever emerged. But the waters off Takashima Island in Imari Bay have yielded traces of the Mongol fleet and its destruction.