Eichi was most enthusiastic about social activities in the business world and served as the president of nursing house at the request of Tokyo City and was involved in the establishment of Tokyo Jikei Kai, Japanese Red Cross Society and Rai Yobo Kyokai (Japan preventive association for leprosy) and served as the first presidents of St.Lukes International Hospital and Takinogawa-Gakuen and the Japanese chairman of the YMCA pacific rim liaison conference.
栄一は実業界の中でも最も社会活動に熱心で、東京市からの要請で養育院の院長を務めたほか、東京慈恵会、日本赤十字社、癩予防協会の設立などに携わり財団法人聖路加国際病院初代理事長、財団法人滝乃川学園初代理事長、YMCA環太平洋連絡会議の日本側議長などもした。