Chihiro Nunome defeated Akari Inoue 6-4 6-4 in the Kofu 10K round of 16 on hard. The upset overturned the form book — Akari Inoue came in leading the head-to-head 2–1. Chihiro Nunome narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-06-08 | Kashiwa $25K | Q16 | hard | Chihiro Nunome | 1-6 6-1 7-6(4) |
| 2012-03-26 | Nishi Tama 10K | Q16 | hard | Akari Inoue | 6-0 6-7(6) 2-1 |
| 2011-05-23 | Niigata 25K | Q16 | hard | Akari Inoue | 7-5 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.