During the Boshin War that broke out in January 1868, Jingoro joined the forces of the Tokugawa shogunate headed by Keisuke OTORI and took part in the battles in Imaichi City and the Aizu Domain.
慶応4年（1868年）1月に戊辰戦争が始まると、大鳥圭介率いる旧幕府軍に投じて今市、会津藩へ転戦。