| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 新装版Basic Japanese for Students はかせ〈1〉留学生の日本語初級45時間 shinsoubanBasic Japanese for Students hakase〈1〉ryuugakuseinonihongo/ | 978-4-88319-405-6 (4-88319-405-1) | 2006 |
| 新装版Basic Japanese for Students はかせ〈2〉留学生の日本語初級45時間 shinsoubanBasic Japanese for Students hakase〈2〉ryuugakuseinonihongo/ | 978-4-88319-406-3 (4-88319-406-X) | 2006 |
| 日本語初級〈2〉大地―基礎問題集 nihongo/ | 978-4-88319-524-4 (4-88319-524-4) | 2010 |