Kaori Aoyama defeated Sachie Umehara 6-3 6-2 6-4 in the Ioujima-Town 10K round of 32 on carpet. The upset overturned the form book — Sachie Umehara came in leading the head-to-head 1–0. Kaori Aoyama claimed a first win over Sachie Umehara in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-09-25 | Saga 25K | R16 | grass | Sachie Umehara | 6-1 6-4 |