On the occasion of his coming-of-age ceremony at the age of 15, he entered government service in the Edo residence of the successive lords of Hojo Domain, Awa Province (Mizuno Iki no kami Tadateru).
15歳・元服を機に、安房国北条藩の北条藩歴代藩主（みずのいきのかみただてる）の江戸屋敷に仕官する。