Later Tametomo, who was still an exile, raised an army and led the local ruling families of the nearby areas to become independent, so Mochimitsu hunted him and forced him to commit suicide in 1170.
やがて為朝が流人の身でありながら周辺諸豪族を切り従えて自立の動きを見せたため、嘉応2年（1170年）にこれを追討し自害に追い込んでいる。