Because Yoriyoshi suspected ABE no Sadato, son of Yoritoki, of having attacked the camp of Yoriyoshi's forces, Yoritoki resolved to revolt out of love for his son and the Abe clan gained superiority in the ensuing battle.
頼義が頼時の子である安倍貞任（さだとう）に頼義方の陣営を襲撃した嫌疑をかけたため、頼時が父子の情愛から蜂起を決意、安倍氏の優位に戦いが進んだこと。