In the winter of 1180, during the nation-wide revolt of the Minamoto forces in response to the princely command of the Prince Mochihito, TAIRA no Kiyomori, who regarded the existence of the Minamoto clan at Kawachi Ishikawa manor, formerly a stronghold of the Kawachi-Genji (Minamoto clan), as a dangerous threat, put a plan in motion which lured Yoshimoto and the greater part of the Ishikawa-Genji (Minamoto clan) strength away to Toba (today's Fushimi Ward, Kyoto City), where he quickly had them surrounded and annihilated.
治承四年（1180年）冬、以仁王の令旨を受けて全国の源氏勢が蜂起する中、河内源氏のかつて本拠地の河内石川の源氏の存在を危険視した平清盛は、策略を用いて義基ら石川源氏の主力を鳥羽（京都市伏見区）まで誘い出し、一気に包囲して殲滅させた。