In the ensuing campaign, the Heiji War, he joined the forces of Yoshitomo as his vassal and fought against TAIRA no Shigemori as one of the 17 Bando samurai as retainers of MINAMOTO no Yoshihira, heir and son of Yoshitomo, according to "Heiji Monogatari" (The Tale of the Heiji War).
続く平治の乱でも義朝の郎党として行動し、義朝の嫡子源義平に従う坂東武士17騎の一人として平重盛と戦ったことなどが『平治物語』にみえている。