He was assigned the post of roju in 1866 and was assigned the position of captain of the Second conquest of Choshu; however, he suddenly died in Numazu when he was preparing for the war.
慶応2年（1866年）老中に任ぜられ、第二次長州征伐の大将を命ぜられるが、準備のため帰国した沼津で急死する。