After the death of Nariakira, he became a close aide to Nariakira's younger brother, Hisamitsu, and continuously engaged in the Shuseikan business and in charge of manufacturing cannons and gunpowder.
斉彬の死後は弟の久光の側近となり、引き続き集成館事業に携わり、大砲・火薬製造を担当。