When the Boshin War broke out, he charged forward as Daigungen (Senior Assistant Deputy General) at the Government-general of the Tosando Force headed by Tomomi IWAKURA's son, Tomosada,
戊辰戦争が勃発すると、岩倉具視の子である具定を総督とする東山道軍総督府大軍監として進軍。