| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Japanese in a Flash Kit Volume 1 | 978-0-8048-3791-0 (0-8048-3791-0) | 2007 |
| Japanese Kanji Power | 978-4-8053-0859-2 (4-8053-0859-1) | 2010 |
| Kanji Power: A Workbook for Mastering Japanese Characters | 978-0-8048-1725-7 (0-8048-1725-1) | 1993 |