Kōzai Sukemura

Kōzai Sukemura (1183–1235) was a Kamakura-period warrior, founder of the Kōzai clan of Sanuki Province, and a son of Nii no Sukemitsu. Fighting for the shogunate in the Jōkyū War of 1221, he won distinction and became district magistrate of Aya and Kagawa districts.

He set up his steward's residence at Saryō in Kasai, Kagawa District, from which he took the name Kōzai, and he also built Katsuga Castle on Mount Shōga. He died in 1235, aged fifty-three.