Yamashiro Sakai

Yamashiro Sakai was a Hizen Province gokenin of the Yamashiro house, one of the Matsuura warrior bands of northern Kyūshū. In the Kōan campaign of the Mongol invasions in 1281, he fought in the Japanese assault on the Mongol Eastern Route Army on Iki Island, in a host of tens of thousands led by the Matsuura and allied bands.

He fought with distinction there. For his service he received a letter of commendation from Hōjō Tokisada, shugo of Hizen.