After Yoshitsune knew that the attack was ordered by Yoritomo through the interrogation of Masatoshi, who was captured in combat, he publicly executed Masatoshi, and in Kyoto stood in rebellion to defeat Yoritomo with his uncle MINAMOTO no Yukiie, who was also opposing Yoritomo.
義経は、捕らえた昌俊からこの襲撃が頼朝の命であることを聞き出すと、これを獄門し同じく頼朝と対立していた叔父の源行家と共に京で頼朝打倒の旗を挙げた。