Yurina Koshino defeated Kei Sekine 6-1 6-0 in the Komoro 10K round of 32 on clay. The result followed the form book — Yurina Koshino came in leading the head-to-head 2–0. Yurina Koshino extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-08-02 | Niigata 10K | QF | carpet | Yurina Koshino | 6-7(6) 6-0 6-1 |
| 2009-11-16 | Hyogo 10K | R32 | carpet | Yurina Koshino | 6-3 6-0 |