He associated with Isami KONDO, who was the leader of Shinsengumi (an Edo shogunate police force) which worked for the maintenance of the public order in Kyoto under the Aizu Domain, and he also provided medical care for its members.
会津藩の下に京都の治安維持の為に活動していた新選組の局長である近藤勇とも親交があり、隊士の診療も行う。