Stadium: Court A Round: 54 Ground: Hardcourt indoor
| ITF W15 - Sapporo | 2023/07/31 06:00 | Kaho Oyama v Yuhan Liu | 1-6,3-6 |
| ITF W15 - Kawaguchi | 2023/06/13 03:30 | Rio Tsuda v Kaho Oyama | 7-6,6-1 |
| ITF W15 - Kawaguchi | 2023/06/13 00:00 | Sera Nishimoto v Kaho Oyama | 3-6,4-6 |
| ITF W15 - Kashiwa | 2023/06/05 01:00 | Shiho Shibata v Kaho Oyama | 6-7,6-4,10-7 |
| ITF W25 - Incheon | 2023/05/14 01:00 | Kaho Oyama v Hee Rae Im | 4-6,1-6 |
| ITF W15 - Fukui | 2023/04/24 02:00 | Kaho Oyama v Nagomi Higashitani | 0-6,1-6 |
| ITF W25 - Osaka | 2023/04/10 01:00 | Kaho Oyama v Chieh-Yu Hsu | 5-7,3-6 |
| ITF W25 - Osaka | 2023/04/09 01:00 | Jamie Lau v Kaho Oyama | 2-6,1-6 |
| ITF W100 - Tokyo | 2023/09/03 08:45 | Carol Zhao v Erina Hayashi | 6-3,6-1 |
| ITF W25 - Aldershot | 2023/08/14 16:55 | Alice Gillan v Erina Hayashi | 6-2,6-4 |
| ITF W25 - Aldershot | 2023/08/13 14:15 | Jaquelyn Ogunwale v Erina Hayashi | 1-6,5-7 |
| ITF W25 - Roehampton | 2023/08/07 10:30 | Erina Hayashi v Maria F Navarro Oliva | 4-6,2-6 |
| ITF W25 - Foxhills | 2023/08/01 08:30 | Mei Yamaguchi v Erina Hayashi | 6-1,6-2 |
| ITF W25 - Foxhills | 2023/07/31 12:15 | Erina Hayashi v Andre Lukosiute | 1-6,7-5,10-2 |
| ITF W60 - Fukuoka | 2023/05/08 01:00 | Erina Hayashi v Nana Kawagishi | 1-6,4-6 |
| ITF W15 - Fukui | 2023/04/25 02:00 | Erina Hayashi v Honoka Kobayashi | 3-6,2-6 |