Mayumi Yamamoto defeated Ayumi Oka 6-2 6-0 in the Kofu 10K qualifying round on hard. The result followed the form book — Mayumi Yamamoto came in leading the head-to-head 1–0. Mayumi Yamamoto extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-10-16 | Makinohara 25K | R32 | carpet | Mayumi Yamamoto | 6-4 7-6(4) |