Having been Fukucho-jokin in Shinsengumi, Shuntaro was recruited as a Mimawarigumi-kaku (a status which is equivalent to Mimawarigumi; the shogunate-organized security squad placed in Kyoto) at the time of recruitment of Shinsengumi members as shogun's retainers in July 1867.
慶応三年（1867年）六月の幕臣取立では、副長助勤として見廻組格となっている。