Sachie Ishizu defeated Natsumi Hamamura 6-2 6-2 in the Kurume 50K round of 32 on grass. Sachie Ishizu extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-23 | Niigata 25K | R16 | hard | Sachie Ishizu | 6-4 2-6 6-3 |
| 2009-09-28 | Hamanako 25K | QF | carpet | Natsumi Hamamura | 7-5 3-6 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.