Ayumi Oka defeated Kazusa Ito 6-4 6-4 in the Kyoto 10K qualifying round on carpet. Ayumi Oka extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-02 | Fukuoka 50K | Q32 | grass | Kazusa Ito | 6-3 3-6 7-5 |
| 2007-09-03 | Kyoto 10K | R32 | carpet | Ayumi Oka | 6-1 5-7 6-4 |