In the Kamakura period, the clan took the position of Ezo kanrei (the Shogun aide of the northern part areas of Japan in the Kamakura period) as Miuchibito (private vassals of the Tokuso [the patrimonial head of the main branch of the Hojo clan]), and in the Muromachi period, it seems to have been incorporated into Kyoto fuchishu, and later it became a Sengoku daimyo (Japanese territorial lord in the Sengoku period).
鎌倉時代には御内人として蝦夷管領となり、室町時代には京都扶持衆に組み入れられたと推定され、後に戦国大名となった。