| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| ハロハロ！ 三好絵梨香＆岡田唯 写真集from美勇伝 haroharo！ miyoshierika＆okada/ | 978-4-04-894258-4 (4-04-894258-1) | 2005 |
| 中年童貞 ―少子化時代の恋愛格差― (扶桑社新書) chuunendoutei ―shoushikajidainorenaikakusa― (fusoushashinsho) | 978-4-594-05385-7 (4-594-05385-8) | 2007 |