Since he fought under command of Junsei TSUTSUI during this time, he became one of the local lords belonging to the Tsutsui clan after the fall of the Hatakeyama clan, gradually distinguished himself, and as a samurai taisho (a warrior who gives battle orders and maneuvers troops), he supported Junkei TSUTSUI who succeeded Junsei at the age of no older than two.
その際、筒井順政の指揮下で戦ったことが縁で畠山氏の没落後、筒井氏に従属する領主の一人となり、次第に頭角を現し、順政の後をわずか二歳で継いだ筒井順慶を侍大将として盛り立てた。