Kumiko Iijima defeated Keiko Taguchi 5-7 6-3 6-2 in the Nagano 25K round of 16 on carpet. The upset overturned the form book — Keiko Taguchi came in leading the head-to-head 3–0. Kumiko Iijima claimed a first win over Keiko Taguchi in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-09-19 | Ibaraki 25K | R16 | hard | Keiko Taguchi | 6-2 6-4 |
| 2000-11-20 | Kofu Open | SF | carpet | Keiko Taguchi | 5-3 4-1 5-3 |
| 1999-09-06 | Ibaraki 3 10K | R32 | hard | Keiko Taguchi | 6-3 6-4 |