Hirono Watanabe defeated Chihiro Nunome 6-4 7-6 in the Kyoto 10K round of 32 on hard. The upset overturned the form book — Chihiro Nunome came in leading the head-to-head 2–1, but Hirono Watanabe had been the form player, winning 5 of their last 8 on hard. Hirono Watanabe narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-09-07 | Kyoto $10K | R16 | hard | Chihiro Nunome | 6-1 6-3 |
| 2014-11-17 | Toyota 75K | Q32 | carpet | Hirono Watanabe | 7-5 6-0 |
| 2014-06-16 | Taipei 10K | R16 | hard | Chihiro Nunome | 6-2 6-7(5) 6-3 |