Kublai Khan's Lost Fleet

The account

Twice Kublai Khan launched the largest seaborne invasion the world had known at Japan, and twice a typhoon, the kamikaze, the divine wind, tore his fleet apart. Marine archaeologists off Takashima have raised keels, anchors, cannonballs, and over four thousand artifacts from the seabed, proof of an armada that the sea, not the samurai, defeated.

Leads, where the trail points now

• The site is documented at Imari Bay, off Takashima, Nagasaki, Japan; the open questions now are access and what remains, not where it is.
• Confirm the permit and ownership before any dive or visit, since sites like this are usually protected.
• What is there: The drowned Mongol armada that a 'divine wind' destroyed.