Although the Hiraga clan was once a local ruling family of Saku County, Shinano Province, the clan was defeated by Nobutora TAKEDA and his son Shingen TAKEDA during the Period of Warring States that was when Genshin HIRAGA was the clan head.
元々は信濃国佐久郡の豪族だったが、戦国時代平賀源心の代に甲斐の武田信虎・武田信玄父子に滅ぼされた。