Yurina Koshino defeated Shiho Akita 4-6 7-5 6-3 in the Kofu 10K round of 16 on hard. The upset overturned the form book — Shiho Akita came in leading the head-to-head 2–1. Yurina Koshino narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-03-24 | Nishi Tama 10K | R32 | hard | Shiho Akita | 6-3 6-2 |
| 2009-07-13 | Miyazaki 10K | QF | carpet | Shiho Akita | 6-3 6-2 |
| 2009-03-23 | Kofu 10K | QF | hard | Yurina Koshino | 6-2 6-7(10) 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.