| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 30 Sai no Hoken Taiiku Koi no Step Up Hen Vol.1 - Manga | 978-4-7580-8114-6 (4-7580-8114-X) | 2011 |
| 30 Sai no Hoken Taiiku Koi no Step Up Hen Vol.2 - Manga | 978-4-7580-8152-8 (4-7580-8152-2) | 2012 |
| World Conquest Zvezda Plot - Vol.1 Manga | 978-4-7580-6433-0 (4-7580-6433-4) | 2014 |
editor: Ichijinsha. · iGizmo · Ikegami · ISAACSON · Isaksen · ISECOM · Issacson