Aki Yamasoto defeated Ai Yamamoto 6-4 6-2 in the Hamanako 25K q16 on carpet. The result followed the form book — Aki Yamasoto came in leading the head-to-head 1–0. Aki Yamasoto extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-10-03 | Kofu 50K | Q16 | hard | Aki Yamasoto | 6-4 6-1 |