In that year, he also founded Tosa Yoshino-gawa Suiryoku Denki (Tosa Yoshino-gawa River Hydroelectric Power Plant, the predecessor of Sumitomo Joint Electric Power) for the development of the power supply in Besshi copper mine, and acquired the water right of Mimi-kawa River for the afforestation project in Shiiba, Miyazaki Prefecture.
さらに同年、別子鉱山の電源開発を目的に土佐吉野川水力電気（後の住友共同電力）、宮崎県の椎葉植林に関係して耳川の水利権を確保した。