The 1569 Battle of Tatarahama was part of the struggles between the à Âtomo and Mà Âri samurai clans during Japan's Sengoku period, for control of the island of Kyà «shà «.
The battle took place in the aftermath of a successful siege by the Mà Âri of the à Âtomo's Tachibana castle, which sat just outside the boundaries of today's Fukuoka City.
The two armies met on the shores of Hakata Bay, at Tatarahama, but were evenly matched, and both retreated.
In order to end the deadlock, the à Âtomo made an alliance with the Amago clan. The Mà Âri clan's battles with this larger allied force occupied it to such an extent that Yamanaka Yukimori and Amago Katsuhisa, as part of their arrangement with the à Âtomo, were able to take Izumo province, some distance away on Honshà «, and that the Mà Âri became pressured into abandoning Tachibana.