Masao Hirai

1908

• Amerika no kokugo kyōiku
• Bunshō hyōgen handobukku
• Bunshō hyōgenhō
• Bunshō hyōka hō
• Bunshō saitenhō
• Chiteki settokujutsu
• Fūryū kokugo kyōshitsu
• Gendai no keigo to manā
• Gendaijin no kokugo jōshiki
• Hanashi no jiten
• Hōgen kenkyū no subete
• Kokugo kokuji mondai no rekishi