He was assigned to Gyobu no taifu (Senior Assistant Minister of Justice) in 1870; subsequently he became a core member of the Meiji Government as Sangi (Councillor) and drafted Shinritsu koryo (Outline of the New Criminal Code).
1870年（明治3年）には刑部大輔となり、続いて参議として明治政府の中枢に経ち新律綱領編纂にあたた。