| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Writing, Grade 2 | 978-1-935800-58-3 (1-935800-58-2) | 2013 | Kohei Ogawa · Kaori Tajima · Charlotte Inoue · Kumon |
| Writing, Grade 3 | 978-1-935800-59-0 (1-935800-59-0) | 2013 | Kumon · Koichiro Uchida · Natsuko Saito · Miya Tsunenaga |