During the period from 1515 to 1517, he made a war against the Oi clan, the kokujin ryoshu (local samurai lord) in the western county who was supported by the Imagawa clan of Suruga Province at his base, the Ueno-jo Castle (Minami-Alps City, former Kushigata-machi, Nakakoma County) (the Battle of Oi).
永正12年（1515年）から永正14年にかけて駿河国の今川氏に支援された西郡の国人領主大井氏の本拠上野城（南アルプス市、旧中巨摩郡櫛形町）を攻めた（大井合戦）。