As the clan was in rivalry with the Ouchi clan, it sided with the eastern forces in the Onin War and continued to confront the Ouchi clan, until the Sengoku period, in alliance with the Amako clan.
大内氏とは対立関係にあり、応仁の乱でも東軍方について参戦、以降戦国時代まで尼子氏らと組んで大内氏に対抗した。