Kiyoko Yazawa defeated Sachie Umehara 6-3 6-2 in the Taiwan 10K qualifying round on hard. The upset overturned the form book — Sachie Umehara came in leading the head-to-head 1–0. Kiyoko Yazawa claimed a first win over Sachie Umehara in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-09-07 | Kugayama 1 10K | R32 | hard | Sachie Umehara | 0-6 6-2 6-1 |