In 1507, having joined the army of MINAMOTO no Yoriyoshi in the Battle of Yellow Sea, Kunitae was leading the van of Yoriyoshi's army but as his horse fell, shot by a stray arrow, he was captured by the Abe's troops.
天喜5年(1057年)、黄海合戦に於いて源頼義軍に属し先陣を担っていたが乗馬が流れ矢で倒された為、安倍軍の捕虜となった。