Stadium: A 3 Round: 25 Ground: Synthetic outdoor
| ITF W25 Tsukuba | 2019/08/19 00:30 | Yui Chikaraishi v Ayumi Koshiishi | 2-6,6-2,10-7 |
| ITF W25 Nonthaburi | 2019/07/30 02:30 | Yidi Yang v Ayumi Koshiishi | 6-0,6-2 |
| ITF W25 Nonthaburi | 2019/07/29 06:20 | Thasaporn Naklo v Ayumi Koshiishi | 3-6,4-6 |
| ITF W25 Nonthaburi | 2019/07/23 04:20 | Ayumi Koshiishi v Michika Ozeki | 2-6,4-6 |
| ITF W25 Nonthaburi | 2019/07/22 08:00 | Ho Ching Wu v Ayumi Koshiishi | 3-6,2-6 |
| ITF W15 Gimcheon | 2019/06/20 01:00 | Ayumi Koshiishi v Sunam Jeong | 2-6,6-7 |
| ITF W15 Gimcheon | 2019/06/19 01:00 | Ayumi Koshiishi v Honoka Kobayashi | 4-6,6-4,6-4 |
| ITF W15 Gimcheon | 2019/06/14 02:00 | Ayumi Koshiishi v Misaki Matsuda | 5-7,7-6,3-6 |
| ITF W25 Hong Kong | 2019/05/28 08:00 | Angelina Gabueva v Anri Nagata | 6-4,3-6,10-6 |
| ITF W25 Hong Kong | 2019/05/27 09:30 | Yan-Tung Ki v Anri Nagata | 1-6,1-6 |
| ITF W25 Karuizawa | 2019/05/22 01:00 | Anri Nagata v Ari Matsumoto | 1-6,1-6 |
| ITF W25 Osaka | 2019/04/08 01:00 | Risa Ushijima v Anri Nagata | 4-6,6-1,10-2 |
| ITF W25 Yokohama | 2019/03/06 02:55 | Rutuja Bhosale v Anri Nagata | 3-6,6-2,6-0 |
| ITF Women Antalya | 2018/12/20 07:00 | Anri Nagata v Daria Mishina | 6-4,3-6,0-6 |
| ITF Women Antalya | 2018/12/18 06:00 | Anri Nagata v Utaka Kishigami | 5-7,6-4,10-4 |
| ITF Women Antalya | 2018/12/17 09:30 | Anri Nagata v Maria Manilova | 3-6,7-5,6-0 |