He entered his father's birthplace, the Taguchi family, village headman in Tsukechi Village, Mino Province (present Tsukechi-cho, Nakatsugawa City, Gifu Prefecture) and called himself Shunpei Taguchi.
父の生家である美濃国付知村（現岐阜県中津川市付知町）の庄屋田口家へ入り、田口俊平と称した。