Taking on the Eastern Camp during the Onin War, he was later named Shugo in the Tango Province and ordered to conquer the Isshiki clan of the Western Camp, but the fighting did not go well and he was often attacked in Wakasa.
応仁の乱で東軍に組し、のちに丹後国の守護にも任命され西軍の一色氏の征伐を命ぜられたが苦戦し、逆に若狭に攻め込まれることも多かった。