| In 1912, he started the production of seamless steel pipes in Sumitomo Shindo-jo (Sumitomo Copper Plant, current Sumitomo Metals and Sumitomo Light Metal Industries) to meet the demand of the navy's condensation pipes. |
明治45年には伸銅場（現、住友金属・住友軽金属）で継ぎ目なし鋼管の製造に着手し、海軍の復水管需要に応える。 |