In November 1183, Yoshinaka ordered an army headed by MINAMOTO no Yoshikiyo (Yada hogandai) to start attacking the headquarters of the Taira family in the Yashima region, Sanuki Province and prepare for crossing the sea in the Mizushima region, Bicchu Province.
同年閏10月、義仲は讃岐国屋島の平家の本営を攻略すべく源義清(矢田判官代)を大将とする軍を進発させ備中国水島で渡海の準備をさせた。