After the Meiji Restoration, in 1868 he became a junior councilor (sanyo) and an officer of the Seido Torishirabekyoku (Department for Institutional Investigation) in the new government, and assisted Takachika FUKUOKA in drafting "The 1868 Constitution."
明治維新後は、慶応4年（1868年）、新政府の参与・制度取調局判事となり、福岡孝悌と『政体書』起草に携わる。