Akiko Yonemura defeated Ayumi Oka 6-4 3-6 6-3 in the Hamanako 25K round of 16 on carpet. 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 |
|---|---|---|---|---|---|
| 2011-10-03 | Kofu 50K | R32 | hard | Akiko Yonemura | 2-6 7-5 7-5 |
| 2009-09-28 | Hamanako 25K | R32 | carpet | Akiko Yonemura | 3-6 7-6(5) 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.