Kasai Kiyoshige

Kasai Kiyoshige (1161–1238) was a late Heian and early Kamakura warrior and founder of the Kasai clan, a Toshima cadet line. Third son of Toshima Kiyomoto, he inherited the Kasai manor in Shimōsa and joined Minamoto no Yoritomo's uprising in 1180, fighting in the Genpei War and the 1189 Ōshū campaign.

Yoritomo made him first Ōshū sōbugyō, entrusting him with Mutsu's government. A trusted Hōjō elder, he later took vows and died a monk under Shinran.