He subsequently became a pupil of the Ito Hokushin-ittoryu fencing school in Saga-cho, Fukagawa (Koto Ward) where his ability was recognized by school master Seiichi ITO who adopted him and named him Taizo ITO.
のちに深川(江東区)佐賀町の北辰一刀流剣術伊東道場に入門するが、道場主伊東精一に力量を認められて婿養子となり、伊東大蔵と称した。