| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Bokutachi yattenai: Tokyo ayase boshi goto satsujin jiken. | 978-4-905447-03-0 (4-905447-03-8) | 2012 | Wataru Hosaka |
| Kohai no karute: Shonen kanbetsu bango sengohyakuhachijukyu. | 978-4-905447-01-6 (4-905447-01-1) | 2012 | |
| Mo hitotsu no michi: Kyoso kara kyosei e. | 978-4-905447-06-1 (4-905447-06-2) | 2012 | |