Stadium: Court 12 Round: 26 Ground: Synthetic outdoor
| ITF Women Karuizawa | 2018/05/23 01:00 | Anastasia E Nefedova v Ayaka Okuno | 7-6,3-6,4-6 |
| ITF Women Kurume Qual | 2018/05/13 00:30 | Sakura Hondo v Ayaka Okuno | 6-7,6-4,7-6 |
| ITF Women Fukuoka Qual | 2018/05/06 07:05 | Akari Inoue v Ayaka Okuno | 6-1,6-4 |
| ITF Women Gifu Qual | 2018/04/29 03:10 | Mai Hontama v Ayaka Okuno | 5-7,7-6,6-2 |
| ITF Women Quanzhou Qual | 2018/04/21 05:45 | Ao Gai v Ayaka Okuno | 6-3,6-4 |
| ITF Women Kashiwa Qual | 2018/04/01 03:00 | Ayaka Okuno v Shiho Akita | 1-6,0-6 |
| ITF Women Kofu Qual | 2018/03/25 02:30 | Ayaka Okuno v Alina Silich | 1-6,1-6 |
| ITF Women Kofu Qual | 2018/03/24 04:00 | Charlotte Robillard-Millette v Ayaka Okuno | 1-6,1-6 |
| ITF Women Karuizawa | 2018/05/23 01:00 | Rina Saigo v Abbie Myers | 6-7,3-6 |
| ITF Women Kurume | 2018/05/20 01:00 | Abbie Myers v Ayano Shimizu | 3-6,5-7 |
| ITF Women Kurume | 2018/05/19 01:00 | Naomi Broady v Abbie Myers | 5-7,3-6 |
| ITF Women Kurume | 2018/05/18 04:45 | Tammi Patterson v Abbie Myers | 3-6,6-2,4-6 |
| ITF Women Kurume | 2018/05/17 01:00 | Abbie Myers v Asia Muhammad | 6-3,6-1 |
| ITF Women Kurume | 2018/05/16 02:35 | Abbie Myers v Anastasia E Nefedova | 5-7,7-6,7-6 |
| ITF Women Kurume Qual | 2018/05/15 01:00 | Abbie Myers v Aiko Yoshitomi | 6-1,7-6 |
| ITF Women Kurume Qual | 2018/05/14 01:00 | Abbie Myers v Mai Hontama | 6-1,6-4 |