| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| しっかり身につく韓国語トレーニングブック (CD book) shikkariminitsukukankokugotoreーningubukku (CD book) | 978-4-86064-005-7 (4-86064-005-5) | 2002 |
| 使える中級韓国語―場面別会話と文型と練習 (CD book) tsukaeruchuukyuukankokugo―bamenbetsukaiwatobunkeitorenshuu (CD book) | 978-4-86064-089-7 (4-86064-089-6) | 2005 |