Maya Kato defeated Natsumi Hamamura 6-3 1-6 7-6 in the Gunma 25K round of 32 on carpet. The upset overturned the form book — Natsumi Hamamura came in leading the head-to-head 2–0. Maya Kato claimed a first win over Natsumi Hamamura in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-07-30 | Obihiro 25K | R16 | carpet | Natsumi Hamamura | 6-3 6-3 |
| 2006-08-14 | Tokyo 2 10K | R32 | hard | Natsumi Hamamura | 6-1 6-1 |