Aki Yamasoto defeated Yurina Koshino 6-1 6-4 in the Makinohara 25K round of 32 on carpet. The result followed the form book — Aki Yamasoto came in leading the head-to-head 2–0. Aki Yamasoto extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-09-01 | Noto 25K | Q16 | carpet | Aki Yamasoto | 6-0 6-1 |
| 2010-08-02 | Niigata 10K | F | carpet | Aki Yamasoto | 6-4 6-7(3) 7-5 |