Stadium: Court A Round: 45 Ground: Hardcourt indoor
| ITF - W25 Kyoto | 2019/09/02 00:00 | Ayumi Koshiishi v Hx Izabella Tan | 6-0,6-1 |
| ITF - W25 Nanao | 2019/08/27 01:00 | Ayumi Koshiishi v Anri Nagata | 4-6,0-6 |
| 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 - W25 Kyoto | 2019/09/02 00:00 | Utaka Kishigami v Mana Kawamura | 6-2,6-2 |
| ITF - W25 Nanao | 2019/08/25 03:00 | Hiromi Abe v Utaka Kishigami | 6-4,6-3 |
| ITF W25 Tsukuba | 2019/08/19 02:25 | Ramu Ueda v Utaka Kishigami | 6-2,6-2 |
| ITF - W15 Cancun | 2019/08/01 15:30 | Utaka Kishigami v Lian Tran | 6-4,4-6,1-6 |
| ITF - W15 Cancun | 2019/07/31 17:35 | Utaka Kishigami v Katya Ramirez | 6-1,6-2 |
| ITF - W15 Cancun | 2019/07/29 18:00 | Utaka Kishigami v Jami Marie Burt | 6-0,6-0 |
| ITF - W15 Cancun | 2019/07/23 18:35 | Utaka Kishigami v Thaisa Grana Pedretti | 7-6,0-6,0-6 |
| ITF - W15 Cancun | 2019/07/15 19:00 | Utaka Kishigami v Magdalena Stoilkovska | 5-7,7-5,5-10 |