Stadium: Court A10 Round: 62 Ground: Synthetic outdoor
| ITF Women Tsukuba | 2018/08/19 03:00 | Haruna Arakawa v Ayumi Miyamoto | 4-6,6-4,6-1 |
| ITF Women Kofu | 2018/06/14 01:00 | Ayumi Miyamoto v Kai-Chen Chang | 3-6,7-5,4-6 |
| ITF Women Kofu | 2018/06/12 02:50 | Ayumi Miyamoto v Mana Kawamura | 3-6,6-1,7-5 |
| ITF Women Kofu Qual | 2018/06/10 00:00 | Ayumi Miyamoto v Hikaru Sato | 6-1,6-0 |
| ITF Women Kofu Qual | 2018/06/09 04:00 | Ayumi Miyamoto v Funa Kozaki | 6-2,6-2 |
| ITF Women Karuizawa | 2018/05/24 04:15 | Ayumi Miyamoto v Sakura Hondo | 5-7,1-6 |
| ITF Women Karuizawa | 2018/05/22 01:00 | Ayumi Miyamoto v Michika Ozeki | 6-1,6-1 |
| ITF Women Karuizawa Qual | 2018/05/21 01:00 | Ayumi Miyamoto v Natsuho Nakazawa | 6-1,6-2 |