In the same year, Ujimasa removed Sukemasa OTA (the lord of Iwatsuki Castle of Musashi Province) from Musashi Province by maneuvering Ujisuke OTA, the oldest son of Sukemasa, and established the hegemony of the Hojo clan over the entire Musashi Province.
同年には武蔵国岩槻城主・太田資正の長男・太田氏資を調略して、資正を武蔵から追い武蔵全域の支配権を確立した。