酒井氏
In 1854 he was born as a son of Furuichi Takashi a retainer of Sakai clan in Edo. In 1869, he entered "Kaisei gakkō", in 1870, he was elected student on scholarship in Himeji Domain, and entered "Daigaku Nankō", then studied abroad to Ecole Centrale des Arts et Manufactures in Paris as the Ministry of Education first student studying abroad. In 1879, he graduated and got the degree of BE. In the same year he entered the Faculty of Science of University of Paris, in 1889 graduated, got Bachelor of Science, and went home and took up a post as "Naimushō Doboku-kyoku Yatoi". In 1881, he became the University of Tokyo lecturer and after that, he concurrently held the posts of the university teacher with the bureaucrat technical expert.