Seiko Okamoto defeated Aki Yamasoto 6-2 6-0 in the Karuizawa 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 |
|---|---|---|---|---|---|
| 2007-05-28 | Gunma 25K | QF | carpet | Seiko Okamoto | 6-3 6-2 |