Kotomi Takahata defeated Hirono Watanabe 6-4 6-2 in the Kashiwa 10K round of 32 on hard. The result followed the form book — Kotomi Takahata came in leading the head-to-head 2–1. Kotomi Takahata extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-09-07 | Kyoto $10K | R32 | hard | Hirono Watanabe | 6-4 6-2 |
| 2015-03-23 | Nishi Tama $10K | R32 | hard | Kotomi Takahata | 7-6(1) 6-4 |
| 2014-10-13 | Makinohara 25K | R32 | grass | Kotomi Takahata | 6-4 1-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.