Stadium: I Round: 45 Ground: Hardcourt outdoor
| WTA Nanchang Qual | 2018/07/22 10:25 | Mai Minokoshi v Hiroko Kuwata | 2-6,1-6 |
| ITF Women Singapore | 2018/06/07 03:00 | Mai Minokoshi v Hiroko Kuwata | 1-6,1-6 |
| ITF Women Gatineau | 2017/07/17 14:00 | Hiroko Kuwata v Mai Minokoshi | 1-6,6-4,6-1 |
| ITF Women Tsukuba | 2018/08/23 00:30 | Hiroko Kuwata v Chihiro Muramatsu | 6-7,2-6 |
| ITF Women Nonthaburi | 2018/08/14 05:30 | Punnin Kovapitukted v Hiroko Kuwata | 6-3,6-3 |
| ITF Women Nonthaburi | 2018/08/06 06:45 | Hiroko Kuwata v Hua-Chen Lee | 6-1,0-6,3-6 |
| WTA - Nanchang | 2018/07/24 09:00 | Hiroko Kuwata v Fangzhou Liu | 5-7,3-6 |
| WTA Nanchang Qual | 2018/07/22 10:25 | Mai Minokoshi v Hiroko Kuwata | 2-6,1-6 |
| WTA Nanchang Qual | 2018/07/21 13:10 | Chantal Skamlova v Hiroko Kuwata | 4-6,0-6 |
| ITF Women Nonthaburi | 2018/07/20 05:45 | Hiroko Kuwata v Kai-Lin Zhang | 6-1,2-6,5-7 |
| ITF Women Nonthaburi | 2018/07/20 02:00 | Hiroko Kuwata v Rutuja Bhosale | 6-2,6-1 |
| ITF Women Tsukuba | 2018/08/23 00:30 | Mai Minokoshi v Nagi Hanatani | 4-6,6-1,4-6 |
| ITF Women Tsukuba | 2018/08/21 05:10 | Mai Minokoshi v Haruka Kaji | 6-3,6-2 |
| ITF Women Guiyang | 2018/08/14 06:55 | Mai Minokoshi v Qinwen Zheng | 5-7,6-2,5-7 |
| ITF Women Jinan | 2018/08/10 07:30 | Lin Zhu v Mai Minokoshi | 6-1,6-1 |
| ITF Women Jinan | 2018/08/08 10:45 | Erika Sema v Mai Minokoshi | 2-6,0-6 |
| WTA Nanchang Qual | 2018/07/22 10:25 | Mai Minokoshi v Hiroko Kuwata | 2-6,1-6 |
| WTA Nanchang Qual | 2018/07/21 12:20 | Mai Minokoshi v Yue Yuan | 4-6,6-3,6-2 |
| ITF Women Astana | 2018/07/19 05:00 | Mai Minokoshi v Ekaterina Yashina | 3-6,4-6 |