When the Ikedaya Incident broke out, although he was assigned to Toshizo HIJIKATA's platoon and was investigating the movements of the opponents in Yakata area in the Shikoku region, he hastened to Ikedaya Inn in Kyoto to back up Isami KONDO.
池田屋事件では土方歳三の隊に配属され四国屋方面の探索をし、池田屋へ向かい近藤勇を援護した。