In the Boshin War, he was appointed the army commander of the Tosa Domain and a staff officer of the spearhead governor of Tosan-do Road, smashing Shinsengumi led by Isami KONDO in the Battle of Koshu-Katsunuma.
戊辰戦争では土佐藩軍指令・東山道先鋒総督府参謀として、甲州勝沼の戦いで近藤勇の率いる新撰組を撃破。