Stadium: COURT B Round: 54 Ground: Synthetic outdoor
| ITF Women Makinohara | 2018/10/07 03:00 | Andrea R Villarreal v Honoka Kobayashi | 0-6,3-6 |
| ITF Women Yeongwol | 2018/09/05 01:00 | Hanna Chang v Erina Hayashi | 6-1,6-4 |
| ITF Women Kurume | 2018/05/15 03:50 | Erina Hayashi v Abigail Tere-Apisah | 1-6,2-6 |
| ITF Women Fukuoka | 2018/05/09 02:00 | Rika Fujiwara v Erina Hayashi | 6-4,6-4 |
| ITF Women Fukuoka Qual | 2018/05/08 01:00 | Tara Moore v Erina Hayashi | 6-7,6-2,6-3 |
| ITF Women Fukuoka Qual | 2018/05/07 03:55 | Yukina Saigo v Erina Hayashi | 4-6,5-7 |
| ITF Women Fukuoka Qual | 2018/05/06 07:00 | Haruna Sakamoto v Erina Hayashi | 1-6,2-6 |
| ITF Women Gifu Qual | 2018/04/30 01:00 | Hiroko Kuwata v Erina Hayashi | 6-2,7-6 |
| ITF Women Gifu Qual | 2018/04/29 04:40 | Emily Webley-Smith v Erina Hayashi | 4-6,6-4,4-6 |