Stadium: Court 14 Round: 25 Ground: Synthetic outdoor
| 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 |
| ITF Women Osaka Qual | 2018/04/08 03:30 | Miyamoto, Ayumi v Xinyu Wang | 1-6,3-6 |
| ITF Women Osaka Qual | 2018/04/07 05:30 | Takayama, Chihiro v Miyamoto, Ayumi | 2-6,4-6 |
| ITF Women Kashiwa Qual | 2018/04/01 02:00 | Inoue, Miyabi v Miyamoto, Ayumi | 6-4,7-5 |
| ITF Women Kurume Qual | 2018/05/15 01:00 | Hondo, Sakura v Michika Ozeki | 0-6,6-3,6-2 |
| ITF Women Kurume Qual | 2018/05/14 01:00 | Hosonuma, Chisa v Michika Ozeki | 6-7,2-6 |
| ITF Women Kurume Qual | 2018/05/13 00:30 | Inoue, Akari v Michika Ozeki | 2-6,6-1,4-6 |
| ITF Women Fukuoka Qual | 2018/05/06 02:40 | Olivia Tjandramulia v Michika Ozeki | 6-2,7-6 |
| WTA Anning Qual | 2018/04/28 06:30 | Sun, Xu Liu v Michika Ozeki | 7-6,7-6 |
| Quanzhou, Qualifications Simples W-WITF-CHN-04B | 2018/04/21 08:05 | Ying Zhang v Michika Ozeki | 3-6,6-3,6-1 |
| ITF Women Canberra | 2018/03/28 23:00 | Katy Dunne v Michika Ozeki | 6-3,6-0 |
| ITF Women Canberra | 2018/03/27 00:50 | Michika Ozeki v Mataruga, Ramona | 6-4,6-1 |