Mari Inoue defeated Yurina Koshino 6-3 6-3 in the Tokyo 10K round of 32 on carpet. Mari Inoue extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-04-25 | Gifu 50K | Q16 | hard | Yurina Koshino | 7-5 6-1 |
| 2006-09-04 | Kyoto 10K | R32 | carpet | Mari Inoue | 6-3 4-6 7-6(4) |