Yurina Koshino defeated Mari Inoue 7-5 6-1 in the Gifu 50K qualifying round of 16 on hard. The upset overturned the form book — Mari Inoue came in leading the head-to-head 2–0, but Yurina Koshino had been the form player, winning 3 of their last 7 on hard. Yurina Koshino claimed a first win over Mari Inoue in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-08-13 | Tokyo 10K | R32 | carpet | Mari Inoue | 6-3 6-3 |
| 2006-09-04 | Kyoto 10K | R32 | carpet | Mari Inoue | 6-3 4-6 7-6(4) |