E. Divo · E. Duffey · E. Duffy · EU-Dap
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 徹底攻略LPI 問題集 Level1/Release3 対応 tetteikouryakuLPI mondaishuu Level1/Release3 taiou | 978-4-8443-2794-3 (4-8443-2794-1) | 2009 |
| 徹底攻略LPI教科書 Level1／Release3対応 tetteikouryakuLPIkyoukasho Level1／Release3taiou | 978-4-8443-2999-2 (4-8443-2999-5) | 2011 |
| 改訂新版 徹底攻略LPI問題集Level1/Release2対応 kaiteishimban/ | 978-4-8443-2510-9 (4-8443-2510-8) | 2007 |