Stadium: Court 7 Round: 28 Ground: Hardcourt outdoor
| ITF W15 Sapporo | 2023/08/04 00:55 | Funa Kozaki v Rinon Okuwaki | 4-6,5-7 |
| ITF W15 Sapporo | 2023/08/03 04:00 | Ange Oby Kajuru v Rinon Okuwaki | 3-6,2-6 |
| ITF W15 Sapporo | 2023/08/01 01:00 | Rinon Okuwaki v Nana Kawagishi | 6-3,7-6 |
| ITF W15 Sapporo | 2023/07/27 01:00 | Ayumi Miyamoto v Rinon Okuwaki | 6-1,4-6,6-2 |
| ITF W15 Sapporo | 2023/07/26 01:00 | Kurumi Tamura v Rinon Okuwaki | 5-7,2-6 |
| ITF W15 Lakewood | 2023/07/14 19:20 | Malkia Ngounoue v Rinon Okuwaki | 6-3,2-6,6-3 |
| ITF W15 Lakewood | 2023/07/05 21:10 | Rinon Okuwaki v Taylor Cataldi | 5-7,5-7 |
| ITF W15 Irvine | 2023/06/29 18:00 | Eryn Cayetano v Rinon Okuwaki | 3-6,7-5,6-2 |
| ITF W15 Sapporo | 2023/08/04 01:00 | Yuhan Liu v Kayo Nishimura | 1-6,4-6 |
| ITF W15 Sapporo | 2023/08/03 06:40 | Kayo Nishimura v Moeka Miyata | 6-0,6-2 |
| ITF W15 Sapporo | 2023/08/02 02:20 | Kayo Nishimura v Yuna Ohashi | 6-2,7-5 |
| ITF W15 Sapporo | 2023/07/27 03:50 | Kayo Nishimura v Mio Mushika | 4-6,3-6 |
| ITF W15 Sapporo | 2023/07/26 03:20 | Chisato Kanemaki v Kayo Nishimura | 1-6,3-6 |
| ITF W15 Kawaguchi | 2023/06/15 00:30 | Kayo Nishimura v Mao Mushika | 4-6,2-6 |
| ITF W15 Kawaguchi | 2023/06/13 05:00 | Kanon Sawashiro v Kayo Nishimura | 4-6,6-7 |
| ITF W15 Kashiwa | 2023/06/06 01:00 | Kayo Nishimura v Lisa-Marie Rioux | 4-6,3-6 |