In November 1183, in order to attack the headquarters of the Taira clan in Yashima, Sanuki Province, Yoshinaka dispatched MINAMOTO no Yoshikiyo (Yada hogandai) to make preparations in the Mizushima region, Bicchu Province, for organizing a navy to cross the sea, but the troop, having TAIRA no Tomomori as its commander in chief and Norimori, Michimori, and Noritsune, father and sons, as lieutenant generals attacked; Yoshinaka's troop were annihilated and Yoshikiyo ASHIKAGA committed suicide.
同年閏10月、讃岐国屋島の平氏の本営を攻略すべく義仲は源義清(矢田判官代)を派遣し、備中国水島で渡海のための水軍編成の準備をさせるが、そこへ平知盛を総大将とし、教盛・通盛・教経父子を副将軍とする軍勢が襲撃、義仲軍は壊滅し、足利義清は自害してしまう。