Akari Inoue defeated Natsumi Hamamura 6-3 2-6 6-2 in the Nagano 25K round of 16 on carpet. Akari Inoue extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-16 | Karuizawa 25K | R32 | carpet | Natsumi Hamamura | 6-2 6-4 |
| 2006-09-04 | Kyoto 10K | R32 | carpet | Akari Inoue | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.