Kumiko Iijima defeated Remi Tezuka 6-7 6-4 6-0 in the Osaka q16 on hard. The upset overturned the form book — Remi Tezuka came in leading the head-to-head 3–2. Kumiko Iijima narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-23 | Niigata 25K | R16 | hard | Remi Tezuka | 5-7 6-1 6-3 |
| 2007-09-10 | Tokyo 50K | R32 | hard | Kumiko Iijima | 6-4 6-4 |
| 2007-05-28 | Gunma 25K | QF | carpet | Kumiko Iijima | 7-5 6-2 |
| 2004-11-01 | Sutama 25K | R32 | clay | Remi Tezuka | 6-1 1-6 6-3 |
| 2002-10-21 | Tokyo 10K | R16 | hard | Remi Tezuka | 6-4 6-1 |