In the 1920s, he became an instructor of history and colonial policy at Takushoku University, where he was also active in the creation of anti-capitalist and nationalist student groups.
Pada 1920an, ia menjadi pengajar sejarah dan kebijakan kolonial di Universitas Takushoku, yang di situ pula dia aktif membentuk kelompok mahasiswa nasionalis dan anti-kapitalis.