| ITF W15 Kawaguchi | 06/13 00:00 | 54 | Nagomi Higashitani v Hikari Yamamoto | 6-2,4-6,10-6 | |
| ITF W15 Kashiwa | 06/08 03:00 | 26 | Kisa Yoshioka v Hikari Yamamoto | 6-3,6-4 | |
| ITF W15 Kashiwa | 06/06 01:00 | 25 | Hikari Yamamoto v Himari Sato | 6-7,6-3,7-5 | |
| ITF W25 Osaka | 04/17 02:00 | 54 | Risa Ushijima v Hikari Yamamoto | 6-4,6-0 |