Kumiko Iijima defeated Kaori Aoyama 6-4 6-3 in the Kusatsu 25K round of 32 on carpet. The upset overturned the form book — Kaori Aoyama came in leading the head-to-head 2–0. Kumiko Iijima claimed a first win over Kaori Aoyama in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-04-19 | Hamanako 10K | R16 | carpet | Kaori Aoyama | 6-2 6-1 |
| 2003-05-19 | Gunma 10K | QF | grass | Kaori Aoyama | 6-2 6-3 |