In the Battle of Toba-Fushimi on January 27, 1868, he organized the Kesshi-tai (suicide corps) with Shinpachi NAGAKURA and others, and cut their way into the enemy position.
慶応4年(1868年)1月3日(旧暦)　鳥羽・伏見の戦いでは、永倉新八らと決死隊を組織し敵陣に斬り込んだ。