Kanae Hisami defeated Chiaki Okadaue 6-2 4-6 6-1 in the Makinohara $25K round of 32 on grass. The upset overturned the form book — Chiaki Okadaue came in leading the head-to-head 3–2. Kanae Hisami narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-06-08 | Kashiwa $25K | R32 | hard | Chiaki Okadaue | 7-6(5) 6-2 |
| 2013-06-03 | Taipei 10K | QF | hard | Kanae Hisami | 7-6(4) 7-5 |
| 2012-10-01 | Esperance 25K | R32 | hard | Chiaki Okadaue | 4-6 6-3 6-2 |
| 2011-08-29 | Tsukuba 25K | R32 | hard | Kanae Hisami | 6-4 6-4 |
| 2007-10-15 | Makinohara 25K | R32 | carpet | Chiaki Okadaue | 4-6 6-4 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.