In August 1155, Yoshikata's nephew MINAMOTO no Yoshihira, who had come down to the Kanto region replacing Yoshitomo, attacked the Okura-yakata and, along with his father-in-law Shigetaka, Yoshikata was killed in the battle of Okura.
久寿2年（1155年）8月、義賢は義朝に代わって東国に下っていた甥の源義平に大蔵館を襲撃され、大蔵合戦に及んで義父・重隆とともに討たれた。