Eri Hozumi defeated Akiko Yonemura 6-2 6-3 in the Karuizawa 25K round of 16 on grass. The upset overturned the form book — Akiko Yonemura came in leading the head-to-head 2–0. Eri Hozumi claimed a first win over Akiko Yonemura in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-09-03 | Noto 25K | R16 | grass | Akiko Yonemura | 7-6(4) 6-3 |
| 2009-05-18 | Nagano 25K | R32 | carpet | Akiko Yonemura | 6-3 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.