Mitsuko Ise defeated Kaori Aoyama 7-5 6-1 in the Sutama 10K qualifying round on clay. The upset overturned the form book — Kaori Aoyama came in leading the head-to-head 2–0. Mitsuko Ise claimed a first win over Kaori Aoyama in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-03 | Niigata 10K | R32 | carpet | Kaori Aoyama | 6-0 7-5 |
| 2004-11-01 | Sutama 25K | R16 | clay | Kaori Aoyama | 3-6 6-3 6-3 |