Natsumi Hamamura defeated Shiho Hisamatsu 7-6 6-1 in the Sutama 25K semi-final on clay. The result followed the form book — Natsumi Hamamura came in leading the head-to-head 3–2. Natsumi Hamamura extended the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-09-06 | Noto 25K | R32 | carpet | Shiho Hisamatsu | 5-7 6-2 6-2 |
| 2010-05-17 | Karuizawa 25K | R16 | carpet | Natsumi Hamamura | 7-6(1) 6-4 |
| 2009-08-10 | Quanzhou 25K | R32 | hard | Natsumi Hamamura | 6-3 6-3 |
| 2007-03-19 | Mumbai 25K | R16 | hard | Natsumi Hamamura | 6-1 6-1 |
| 2006-10-30 | Sutama 25K | R16 | clay | Shiho Hisamatsu | 2-6 6-0 7-6(4) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.