| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Patsu to mite wakaru chimu de sasaeru shin puriseputa dokuhon: Shinjin kango shokuin kenshu gaidorain ni taio. | 978-4-8404-4460-6 (4-8404-4460-9) | 2013 | |
| Tatta itsukakan de ji ga umaku naru hon | 978-4-331-51132-9 (4-331-51132-4) | 2005 | Seiu Yamashita |