http://www.japantimes.co.jp/text/nn20111025a2.html
"Miracle" find: The wreck of a ship that is believed to have been in the invading navy of Kublai Khan lies on the seabed Saturday off Matsuura, Nagasaki Prefecture. RYUKYU UNIVERSITY / KYODO PHOTO
NAGASAKI — The wreck of a ship believed to have been part of the ill-fated attempts by Kublai Khan, the Mongol ruler of China in the 13th century, to invade Japan has been found lying relatively intact under the seabed off Nagasaki Prefecture, a team of Japanese researchers said Monday.
It is the first wreck linked to the invasion attempts to have been discovered in Japan with much of the hull still intact, including a 12-meter section of the keel and rows of planks 10 cm thick and 15 to 25 cm wide attached to the keel, according to University of the Ryukyus professor Yoshifumi Ikeda and his team.
Discovered about 1 meter under the seabed in waters 20 to 25 meters deep off Takashima Island in Matsuura, Nagasaki, the wreck of the vessel, believed to have been over 20 meters long, is expected to provide archeologists with crucial information on the Mongol attacks in 1274 and 1281, which until now have been known mostly from documents and drawings.
"I believe we will be able to understand more about shipbuilding skills at the time as well as the actual situation of exchanges in East Asia," Ikeda told reporters in Nagasaki. He added that the wreck likely remained relatively well preserved because it was buried under the sand.