| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Build Up Your KANJI SENSE 漢字のコツがわかる本 Build Up Your KANJI SENSE kanjinokotsugawakarubon/ | 978-4-87217-696-4 (4-87217-696-0) | 2009 |
| にほんご漢字トレーニング (初級が終わったら始めよう) Shoukyuu ga Owattara Hajimeyou Nihongo Kanji Toreeningu nihongokanjitoreーningu (shokyuugao/ | 978-4-87217-794-7 (4-87217-794-0) | 2011 |