| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 3rd Grade Step Test Study = textbook Eiken Eiken sankyu kyohon: monbu kagakusho nintei | 978-4-01-094360-1 (4-01-094360-2) | 2005 |
| English word target 1900 memorization poster ISBN: 4010339829 | 978-4-01-033982-4 (4-01-033982-9) | 2013 |
| The 2007 Step Test 3 in Practical English Proficiency = 2007 Eiken 4kyu zen mondaishu CD | 978-4-01-094398-4 (4-01-094398-X) | 2007 |
2011.11. editor: Tokyo : Obunsha · editor: Kobunsha. · editor: Obunsha. · kobunsha bunko · Ltd. Kobunsha Publishing Co. · Obenga · Obinocomix · Offensive · Offensta · Offenstadt · Openshaw · OpenStax · Shobunsha