| title | ISBN-13 | year of publication |
|---|---|---|
| 2010 FROGS! | 978-4-635-84036-1 | 2009 |
| FROGS! | 978-4-635-84247-1 | 2012 |
| 2010ウサギぴょんぴょん(Yama-Kei Calendar) 2010usagipyompyon(Yama-Kei Calendar) | 978-4-635-84018-7 | 2009 |
| カレンダー2012 ウサギぴょんぴょん (Yama-Kei Calendar2012) karendaー2012 usagipyompyon (Yama-Kei Calendar2012) | 978-4-635-84142-9 | 2011 |