Kiyomori, believing it was best to annihilate the entire Ishikawa-Genji (Minamoto clan) in Kawachi, all those who were descended from MINAMOTO no Yoshiie, sent MINAMOTO no Suesada, TAIRA no Morizumi and others to attack Ishikawa-jo Castle.
清盛は源義家以来の河内の石川源氏に止めを刺すべく、源季貞、平盛澄らを派遣して石川城を攻撃する。