When Takauji ASHIKAGA, who had turned against the new government, made his way to Kyoto by defeating the Imperial army at the Battle of Hakone and Takenoshita, Chikamitsu disguised to surrender in order to assassinate Takauji.
足利尊氏が新政から離反し、箱根・竹ノ下の戦いで官軍を破って入京すると、親光は尊氏を暗殺するため偽って降伏する。