In 1879, he invited Masaru WATANABE for the position of vice principal of a Yogakko (School of Western Studies) advocated by his older brother Sajibei, then opened the school under the name of Shiritsu Toyo Gakko (Toyo Private School) on January 15.
明治12年（1879年）に兄・佐二平が提唱した洋学校に渡辺勝を招き教頭とし1月15日に私立豆陽学校として開校した。