Minamoto no Yoritoo

Minamoto no Yoritoo (1007–1062) was a mid-Heian Yamato Genji warrior, third son of Minamoto no Yorichika, and held Junior Fifth Rank Lower as Ise no kami. He sat out his father's fatal clash with Kōfuku-ji monks and so escaped Yorichika's exile.

In 1051 he followed Minamoto no Yoriyoshi against the Abe in the Earlier Nine Years' War, and fell in 1062 storming their Kuriyagawa stockade in Mutsu. His son Arimitsu took over the army; Yoritoo is revered as ancestor of the Mutsu Ishikawa.