Kensei Gijuku, at first, was a small school with a rented meeting place, but two years later, due to the support of Aizo and others, a new building with a class room for a regular course, a sewing room, as well as a reception room, was built.
研成義塾は、初めは集会所を借りた小規模なものだったが、2年後、愛蔵らの支援により本科教室と裁縫室、応接室のある新校舎が建てられた。