Akiko Yonemura defeated Seiko Okamoto 6-3 6-4 in the Makinohara 25K final on carpet. The upset overturned the form book — Seiko Okamoto came in leading the head-to-head 2–0. Akiko Yonemura claimed a first win over Seiko Okamoto in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-10-23 | Hamanako 25K | SF | carpet | Seiko Okamoto | 6-3 6-3 |
| 2005-05-09 | Fukuoka 50K | R32 | grass | Seiko Okamoto | 6-1 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.