| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| English contemplation for the college entrance examination (bottom) ISBN: 4010338865 | 978-4-01-033886-5 (4-01-033886-5) | 2008 |
| English pondering on for the college entrance examination ISBN: 4010338733 | 978-4-01-033873-5 (4-01-033873-3) | 2007 |
| (Study books of Kodansha) required 500 English words to learn by solving Dragon English ISBN: 4062878054 | 978-4-06-287805-0 (4-06-287805-4) | 2009 |