Stadium: Court B1 Round: 54
| 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 Perth | 2018/02/14 06:20 | Hiroko Kuwata v Katy Dunne | 3-6,5-7 |
| ITF Women Osaka Qual | 2018/04/07 01:30 | Rebecca Marino v Mitsumi Kawasaki | 6-1,6-4 |
| ITF Women Kofu Qual | 2018/03/25 02:30 | Erika Sema v Mitsumi Kawasaki | 6-0,6-2 |
| ITF Women Kofu Qual | 2018/03/24 03:00 | Chinatsu Shimizu v Mitsumi Kawasaki | 3-6,6-4,2-6 |
| ITF Women Nishi-Tama | 2018/03/19 01:00 | Mitsumi Kawasaki v Chisa Hosonuma | 6-1,4-6,2-6 |
| ITF Women Nishi-Tama | 2018/03/18 01:00 | Mitsumi Kawasaki v Yumeko Yoshitomi | 6-1,6-0 |
| ITF Women Nishi-Tama | 2018/03/17 03:00 | Mitsumi Kawasaki v Shiho Shibata | 7-5,7-5 |
| ITF Women Toyota Qual | 2018/03/11 03:30 | Mitsumi Kawasaki v Misa Eguchi | 0-6,0-6 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Sakura Hondo v Mitsumi Kawasaki | 1-6,4-6 |