Site of Kaneda Fort

Kaneda Fort on Tsushima Island was built in 663 as Japan's front-line defense against an expected Tang Chinese and Silla invasion, following those forces' defeat of Yamato ally Baekje. Baekje engineers who fled to Japan constructed the fort using Korean-style techniques, raising stone walls up to six meters high across the 276-meter summit of Mt. Jo. On clear days the Korean Peninsula is visible from the top. The anticipated invasion never came, and the fort lost its military purpose within decades. A 2.4-kilometer hiking trail passes several surviving wall sections on the way to the summit.