Stadium: COURT F Round: 25 Ground: Synthetic outdoor
| ITF Women Nanao | 2018/08/30 03:00 | Ayumi Koshiishi v Ayano Shimizu | 5-7,3-6 |
| ITF Women Nanao | 2018/08/29 03:30 | Ayumi Koshiishi v Tori Kinard | 7-5,5-7,6-4 |
| ITF Women Nanao | 2018/08/27 05:15 | Ayumi Koshiishi v Yu-Ting Hsieh | 6-0,6-0 |
| ITF Women Nanao | 2018/08/26 05:00 | Ayumi Koshiishi v Ayaka Ozeki | 4-6,6-3,6-3 |
| ITF Women Tsukuba | 2018/08/20 01:00 | Nagi Hanatani v Ayumi Koshiishi | 6-2,7-6 |
| ITF Women Tsukuba | 2018/08/19 00:30 | Ange Oby Kajuru v Ayumi Koshiishi | 1-6,4-6 |
| ITF Women Nonthaburi | 2018/08/11 03:00 | Ayumi Koshiishi v Punnin Kovapitukted | 2-6,2-6 |
| ITF Women Nonthaburi | 2018/08/06 05:15 | Lou Brouleau v Ayumi Koshiishi | 6-1,6-3 |
| ITF Women Makinohara | 2018/10/08 00:30 | Yukina Saigo v Kisa Yoshioka | 6-7,6-3,3-6 |
| ITF Women Osaka Qual | 2018/04/07 02:30 | Kisa Yoshioka v Ji-Hee Choi | 6-4,2-6,4-6 |
| ITF Women Toyota Qual | 2018/03/11 01:00 | Kisa Yoshioka v Julia Lohoff | 3-6,4-6 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Kisa Yoshioka v Sang Hee Park | 6-1,6-1 |
| ITF Women Hamamatsu | 2017/10/18 00:00 | Ayano Shimizu v Kisa Yoshioka | 6-4,6-3 |
| ITF Women Makinohara | 2017/10/13 00:30 | Momoko Kobori v Kisa Yoshioka | 4-6,6-2,7-6 |
| ITF Women Makinohara | 2017/10/12 01:45 | Kisa Yoshioka v Nagi Hanatani | 6-4,3-6,6-1 |
| ITF Women Makinohara | 2017/10/10 01:45 | Michiru Furuya v Kisa Yoshioka | 1-6,6-4,2-6 |