Hiroko Kuwata defeated Ayumi Oka 4-6 7-5 6-3 in the Kofu 10K qualifying round on hard. Hiroko Kuwata extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-04-25 | Gifu 50K | QF | hard | Ayumi Oka | 6-4 6-0 |
| 2010-09-20 | Makinohara 25K | QF | carpet | Hiroko Kuwata | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.