Ayumi Oka defeated Tomoko Dokei 6-4 6-4 in the Kyoto 10K round of 32 on carpet. The upset overturned the form book — Tomoko Dokei came in leading the head-to-head 1–0. Ayumi Oka claimed a first win over Tomoko Dokei in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-09-19 | Ibaraki 25K | R32 | hard | Tomoko Dokei | 6-3 7-5 |