Seiko Okamoto defeated Akiko Gunji 5-4 4-0 1-4 5-3 in the Kofu Open semi-final on carpet. The result followed the form book — Seiko Okamoto came in leading the head-to-head 1–0. Seiko Okamoto extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-09-06 | Ibaraki 4 10K | R32 | hard | Seiko Okamoto | 6-2 4-1 |