After Mombu-taifu (post of Ministry of Education), Sain Fukugicho (Deputy Chairman of the Council of the Left) and Shihosho (Ministry of Justice) were established, Shinpei was successively appointed to various posts in 1872 including Shihokyo (Administrator of the Ministry of Justice) and Sangi (Councillor).
文部大輔、左院副議長、司法省が設置されると明治5年（1872年）には司法卿、参議と数々の役職を歴任。