Stadium: Court B1 Round: 54
| ITF Women Gifu Qual | 2018/04/29 04:20 | Hiroko Kuwata v Satsuki Koike | 6-4,6-1 |
| 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 Gifu Qual | 2018/04/29 04:40 | Emily Webley-Smith v Erina Hayashi | 4-6,6-4,4-6 |
| ITF Women Gifu Qual | 2018/04/29 01:00 | Dabin Kim v Erina Hayashi | 6-7,3-6 |
| ITF Women Osaka Qual | 2018/04/09 02:25 | Erina Hayashi v Makoto Ninomiya | 6-1,6-7,2-6 |
| ITF Women Osaka Qual | 2018/04/08 02:00 | Erina Hayashi v Mai Hontama | 6-0,6-4 |
| ITF Women Osaka Qual | 2018/04/08 01:00 | Erina Hayashi v Michiru Furuya | 6-3,6-3 |
| ITF Women Nishi-Tama | 2018/03/20 02:40 | Erina Hayashi v Ayaka Okuno | 0-6,7-6,3-6 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Aiko Yoshitomi v Erina Hayashi | 6-2,6-1 |
| ITF Women Mallorca | 2018/02/26 10:30 | Eden Silva v Erina Hayashi | 6-2,6-3 |