| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Gaishikei de yatteikeru eigo ga minitsuku | 978-4-7569-0672-4 (4-7569-0672-9) | 2003 | |
| To Acquire Necessary Skills for Multicultural Meetings | 978-4-7569-0786-8 (4-7569-0786-5) | 2004 | Takayuki Ishi |