| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Risuningu no kiso | 978-4-901429-50-4 (4-901429-50-7) | 2007 | |
| Start From Scratch Basic 1400 English Word | 978-4-901429-47-4 (4-901429-47-7) | 2009 | Hisashi Narishige · Brian Maitland · Miguel Corti |