The Mongol Empire attempted to invade Japan in 1274 and 1281, both during the Kamakura Period (1185-1333). It is believed that about 4,400 ships came to the area in the second invasion attempt.

This marks the third confirmed shipwreck found from the 1281 Battle of Koan. The Mongol empire under Kublai Khan had previously tried to invade Japan in 1274 in the same region. Both attempts ...