Ayumi Oka defeated Chinami Ogi 6-3 6-1 in the Gunma 25K round of 32 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 |
|---|---|---|---|---|---|
| 2011-09-05 | Noto 25K | R16 | carpet | Ayumi Oka | 4-6 6-3 6-3 |