According to "Shinsen-gumi Shimatsuki," a lot of his evil deeds were disclosed and he was pressed to commit seppuku or accept decapitation according to the law, and finally he was forced to commit seppuku at fancy Japanese-style restaurant Yama no O in Gion Shinchi where he enjoyed himself.
『新選組始末記』によると悪行の数々を握られて切腹せねば法度に照らして斬首すると詰め寄られ、遊蕩先の祇園新地の料亭山緒でついに切腹させられたという。