In 1864, he returned to his native Kurume Domain and got involved in the process of purchasing warships and creating guns and cannons for the Domain, contributing to the development of the military industry.
元治元年（1864年）には久留米藩に帰り、藩の軍艦購入や銃砲の鋳造に携わり、殖産興業等にも貢献した。