In January 1865, on the occasion of police work in Osaka, with a team of four including his younger brother, Mantaro, he prevented a plot of attacking and burning Osaka by radical supporters of the doctrine of restoring the Emperor and expelling the barbarians.
元治2年（慶応元年）1月、大阪取締りの際、弟・万太郎ら四人で尊攘過激派による大阪焼き討ち計画を未然に防いでいる。