Hakata Bay
The second attack of 1281 was thwarted by a typhoon, or kamikaze, and the Mongols were forced to withdraw. In the Edo period, some of the stones were reused for the construction of Fukuoka Castle, though Genkō Bōrui has remained intact at several points along the Hakata Bay. It was originally called . It was designated a national historic site on March 30, 1931.