- Jitsuryoku Appu Nihongo Nōryoku Shiken: Korede Daijōbu ! 1 Kyu Chōkai Mondai = Preparatory Course For The Japanese Language Proficiency Test
- 実力アップ!日本語能力試験3級文法編初級総仕上げ
- Nihongo Nōryoku Shiken 1 Kyū: Matomete Oboeru Kanji Tango Doriru = The Preparatory Course For The Japanese Language Proficiency Test
- Nihongo Nōryoku Shiken Korede Daijōbu Chōkai Mondai, 2 Kyū: Jitsuryoku Appu! = The Preparatory Course For The Japanese Language Proficiency Test
- Jitsuryoku Appu Nihongo Nōryoku Shiken: Nikiyū Dotsukaihen