Seiko Okamoto defeated Akiko Yonemura 6-3 6-3 in the Hamanako 25K semi-final on carpet. Seiko Okamoto extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-10-15 | Makinohara 25K | F | carpet | Akiko Yonemura | 6-3 6-4 |
| 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.