Kogyokujuku (the original name of Kogyokusha Gakuen), Keio Gijuku and Dojinsha in Tokyo are collectively referred to as 'the three great private schools in the Meiji period' or 'the three great private schools' in some cases.
なお、東京に所在する攻玉塾、慶應義塾、同人社を特にまとめて「明治の三大塾」「三大義塾」と称することもある。