Akiko Yonemura defeated Ayumi Oka 2-6 7-5 7-5 in the Kofu 50K round of 32 on hard. The result followed the form book — Akiko Yonemura came in leading the head-to-head 2–0. Akiko Yonemura extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-09-28 | Hamanako 25K | R32 | carpet | Akiko Yonemura | 3-6 7-6(5) 6-2 |
| 2007-10-22 | Hamanako 25K | R16 | carpet | Akiko Yonemura | 6-4 3-6 6-3 |