Seiko Okamoto defeated Aki Yamasoto 6-3 6-2 in the Gunma 25K qualifying round 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 |
|---|---|---|---|---|---|
| 2010-05-17 | Karuizawa 25K | R32 | carpet | Seiko Okamoto | 6-2 6-0 |