Minamoto no Arimitsu

Minamoto no Arimitsu (1037–1086), second son of Minamoto no Yoritoo and second head of the Mutsu Ishikawa, was born at Monotsu manor in Settsu. He campaigned in Mutsu with his father under Minamoto no Yoriyoshi from 1051, and when Yoritoo fell at the Kuriyagawa stockade in 1062 took command. His merit won him Junior Fifth Rank Lower as Aki no kami and Ishikawa lands.

He built several castles before moving, by tradition, to Mitsuashi Castle; he then took the name Ishikawa and installed Iwashimizu Hachiman as the clan's tutelary deity.