Ayumi Oka defeated Chinami Ogi 4-6 6-3 6-3 in the Noto 25K round of 16 on carpet. The result followed the form book — Ayumi Oka came in leading the head-to-head 1–0. Ayumi Oka extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-05-25 | Gunma 25K | R32 | carpet | Ayumi Oka | 6-3 6-1 |