Maika Ozaki defeated Natsumi Hamamura 6-2 6-3 in the Hiroshima 10K semi-final on carpet. The upset overturned the form book — Natsumi Hamamura came in leading the head-to-head 3–0. Maika Ozaki claimed a first win over Natsumi Hamamura in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-08-14 | Tokyo 2 10K | R16 | hard | Natsumi Hamamura | 6-1 7-6(4) |
| 2004-09-20 | Hiroshima 10K | QF | grass | Natsumi Hamamura | 6-2 6-4 |
| 2004-07-12 | Gunma 25K | R32 | carpet | Natsumi Hamamura | 6-1 6-3 |