Japan. Bunkachō. Kokugoka

• Chūgoku kokokusha no tame no Nihongo kyōiku Q & A.
• Gaikokujin no tame no Nihongo kyōiku no gaiyō
• Gaikokujin no tame no Nihongo tokuhon
• Gairaigo shiryōshū
• Gendai no kokugo o meguru shomondai
• Gijutsu kenshūsei no tame no Nihongo kyōiku Q & A.
• Hanashiai
• Ibunka rikai no tame no Nihongo kyōiku Q & A
• JIS jōhō kōkanyō kanji fugō
• Jitai, jikeisa ichiran
• Jōhōka jidai no gengo seikatsu
• Jōhōka jidai to kanji shiyō