Stadium: Court B1 Round: 54
| ITF Women Gifu Qual | 2018/04/29 01:00 | Hiroko Kuwata v Mitsumi Kawasaki | 6-0,7-6 |
| WTA Zhengzhou Qual | 2018/04/14 03:00 | Ankita Raina v Hiroko Kuwata | 6-3,6-1 |
| ITF Women Osaka | 2018/04/10 01:00 | Ankita Raina v Hiroko Kuwata | 6-4,6-0 |
| ITF Women Kofu Qual | 2018/03/26 03:20 | Hiroko Kuwata v Kyoka Okamura | 6-7,4-6 |
| ITF Women Kofu Qual | 2018/03/25 01:00 | Hiroko Kuwata v Karin Terami | 7-6,6-4 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Hiroko Kuwata v Makoto Ninomiya | 3-6,4-6 |
| ITF Women Mildura | 2018/03/07 03:45 | Anastasia Berezov v Hiroko Kuwata | 6-4,3-6,6-4 |
| ITF Women Perth | 2018/02/21 04:55 | Hiroko Kuwata v Irina Khromacheva | 0-6,3-6 |
| ITF Women Gifu Qual | 2018/04/29 01:00 | Satsuki Koike v Mami Hasegawa | 6-1,6-0 |
| ITF Women Osaka Qual | 2018/04/08 03:30 | Satsuki Koike v Dabin Kim | 2-6,5-7 |
| ITF Women Osaka Qual | 2018/04/07 01:30 | Satsuki Koike v Suzuka Furukawa | 6-0,0-6,6-4 |
| ITF Women Nanjing Qual | 2018/03/24 05:30 | Satsuki Koike v Emma Raducanu | 0-6,0-6 |
| ITF Women Nanjing | 2018/03/17 02:30 | Satsuki Koike v Zoe Gwen Scandalis | 5-7,4-6 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Camilla Rosatello v Satsuki Koike | 6-2,6-2 |
| ITF Women Hamamatsu Qual | 2017/10/17 06:00 | Ingrid Neel v Satsuki Koike | 6-2,6-1 |
| ITF Women Makinohara Qual | 2017/10/09 02:30 | Satsuki Koike v Chinatsu Shimizu | 4-6,5-7 |