Satoko Kurioka defeated Riei Kawamata 6-1 6-4 in the Kugayama 1 10K round of 32 on hard. The upset overturned the form book — Riei Kawamata came in leading the head-to-head 1–0. Satoko Kurioka claimed a first win over Riei Kawamata 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 | Riei Kawamata | 6-1 1-0 RET |