Seiko Okamoto defeated Mari Inoue 6-0 6-0 in the Hamanako 25K round of 32 on carpet. The result followed the form book — Seiko Okamoto came in leading the head-to-head 1–0. Seiko Okamoto extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-05-30 | Gunma 25K | R16 | carpet | Seiko Okamoto | 6-2 6-1 |