Seiko Okamoto defeated Kumiko Iijima 6-1 6-1 in the Ibaraki 10K round of 16 on hard. 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 | R32 | carpet | Seiko Okamoto | 6-3 7-5 |