Stadium: Court 6 Round: 26 Ground: Synthetic outdoor
| ITF Women Nishi-Tama | 2017/03/20 01:00 | Ayumi Koshiishi v Eri Shimizu | 6-3,7-5 |
| ITF W25 - Hamamatsu | 2022/10/12 00:50 | Chihiro Muramatsu v Ayumi Koshiishi | 3-6,6-3,5-7 |
| ITF W15 - Monastir | 2022/05/21 08:30 | Ayumi Morita v Ayumi Koshiishi | 6-3,6-3 |
| ITF W15 - Monastir | 2022/05/20 09:50 | Anja Wildgruber v Ayumi Koshiishi | 3-6,2-6 |
| ITF W15 - Monastir | 2022/05/19 09:35 | Sijia Wei v Ayumi Koshiishi | 4-6,1-6 |
| ITF W15 - Monastir | 2022/05/18 08:30 | Yu Shan v Ayumi Koshiishi | 2-6,4-6 |
| ITF W15 - Monastir | 2022/05/15 08:30 | Ayumi Koshiishi v Fangzhou Liu | 4-6,5-7 |
| ITF W15 - Monastir | 2022/05/14 08:30 | Aleksandra Pospelova v Ayumi Koshiishi | 1-6,4-6 |
| ITF W15 - Monastir | 2022/05/12 08:30 | Ayumi Koshiishi v Milana Zhabrailova | 6-2,3-6,6-1 |
| ITF W25 - Hamamatsu | 2022/10/12 02:00 | Miho Kuramochi v Eri Shimizu | 6-3,3-6,2-6 |
| ITF W25 - Santa Margherita | 2022/09/14 11:55 | Katharina Hobgarski v Eri Shimizu | 7-5,6-0 |
| ITF W25 - Santa Margherita | 2022/09/13 12:00 | Eri Shimizu v Caroline Brack | 6-4,6-4 |
| ITF W60 - Montreux | 2022/09/05 10:50 | Eri Shimizu v Oana Gavrila | 4-6,4-6 |
| ITF W25 - Wien | 2022/08/30 08:00 | Mara Guth v Eri Shimizu | 6-1,6-1 |
| ITF W25 - Wien | 2022/08/29 10:00 | Kamila Neradova v Eri Shimizu | 0-6,0-6 |
| ITF W25 - Wien | 2022/08/28 09:30 | Eva-Maria Riml v Eri Shimizu | 1-6,5-7 |
| ITF W25 - Roehampton | 2022/08/22 12:50 | Eri Shimizu v Katy Dunne | 4-6,4-6 |