Stadium: Court 2 Round: 62 Ground: Hardcourt outdoor
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/06/09 04:00 | Miyamoto, Ayumi v Funa Kozaki | 6-2,6-2 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/24 04:15 | Miyamoto, Ayumi v Hondo, Sakura | 5-7,1-6 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/22 01:00 | Miyamoto, Ayumi v Michika Ozeki | 6-1,6-1 |
| ITF Women Karuizawa Qual | 2018/05/21 01:00 | Miyamoto, Ayumi v Nakazawa, Natsuho | 6-1,6-2 |
| ITF Women Kurume Qual | 2018/05/13 00:30 | Miyamoto, Ayumi v Mai Hontama | 2-6,7-6,2-6 |
| ITF Women Fukuoka Qual | 2018/05/06 06:00 | Moore, Tara v Miyamoto, Ayumi | 6-4,6-2 |
| ITF Women Gifu Qual | 2018/04/29 06:45 | Kyoka Okamura v Miyamoto, Ayumi | 6-7,7-6,7-6 |
| ITF Women Gifu Qual | 2018/04/29 03:15 | Miyamoto, Ayumi v Yuki Naito | 6-2,7-5 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/06/09 04:00 | Hikaru Sato v Kanako Osafune | 6-3,6-2 |