Stadium: Court 6 Round: 28 Ground: Hardcourt outdoor
| ITF W25 Goyang | 2023/05/22 01:00 | Ayumi Koshiishi v Yi Tsen Cho | 2-6,0-6 |
| ITF W25 Goyang | 2023/05/21 01:00 | Ayumi Koshiishi v Eun Ji Lee | 6-3,6-3 |
| ITF W25 Incheon | 2023/05/15 06:40 | Ayumi Koshiishi v Yu Jin Ahn | 4-6,3-6 |
| ITF W25 Incheon | 2023/05/15 02:40 | Ayumi Koshiishi v Qianhui Tang | 5-7,6-3,10-4 |
| ITF W25 Osaka | 2023/04/09 03:00 | Kurea Hayasaka v Ayumi Koshiishi | 6-7,4-6 |
| ITF W25 Kashiwa | 2023/04/03 01:00 | Katarina Kozarov v Ayumi Koshiishi | 6-0,6-3 |
| ITF W25 Kofu | 2023/03/29 04:20 | Ayumi Koshiishi v Eri Hozumi | 4-6,2-6 |
| ITF W15 Hinode | 2023/03/26 00:30 | Natsumi Kawaguchi v Ayumi Koshiishi | 6-1,6-2 |