Akiko Yonemura defeated Shuko Aoyama 6-1 1-6 6-2 in the Kusatsu 25K semi-final on carpet. The upset overturned the form book — Shuko Aoyama came in leading the head-to-head 2–1. Akiko Yonemura narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-11-19 | Toyota 75K | QF | carpet | Shuko Aoyama | 6-3 3-6 6-3 |
| 2010-07-19 | Nonthaburi 25K | R16 | hard | Shuko Aoyama | 6-2 6-3 |
| 2010-05-17 | Karuizawa 25K | R16 | carpet | Akiko Yonemura | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.