| ITF Women Toyota Qual | 2018/03/10 01:00 | Ayaka Okuno v Kyoka Okamura | 1-6,3-6 |
| ITF Women Yokohama Qual | 2018/03/04 07:00 | Ayaka Okuno v Ya-Hsuan Lee | 4-6,4-6 |
| ITF Women Surprise Qual | 2018/02/11 17:00 | Giuliana Olmos v Ayaka Okuno | 6-2,1-6,6-2 |
| ITF Women Hong Kong | 2018/01/02 04:10 | Luksika Kumkhum v Ayaka Okuno | 6-1,6-2 |
| ITF Women Toyota Qual | 2017/11/12 02:00 | Ayaka Okuno v Nozomi Ohya | 2-6,3-6 |
| ITF Women Shenzhen Qual | 2017/11/06 03:00 | Ayaka Okuno v Zhuoma Ni Ma | 1-6,7-6,2-6 |
| ITF Women Hamamatsu | 2017/10/18 01:50 | Mitsumi Kawasaki v Ayaka Okuno | 6-1,6-1 |
| ITF Women Makinohara | 2017/10/11 00:30 | Ayaka Okuno v Megumi Nishimoto | 3-6,0-6 |
| ITF Women Toyota Qual | 2018/03/12 02:45 | Shiho Akita v Na Ri Kim | 6-3,6-2 |
| ITF Women Toyota Qual | 2018/03/11 03:30 | Shiho Akita v Mei Yamaguchi | 6-3,6-1 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Shiho Akita v Kei Kato | 6-0,6-3 |
| ITF Women Yokohama Qual | 2018/03/06 01:00 | Shiho Akita v Yexin Ma | 2-6,6-4,1-6 |
| ITF Women Yokohama Qual | 2018/03/04 06:00 | Shiho Akita v Suzuho Oshino | 6-4,7-5 |
| ITF Women Launceston Qual | 2018/02/04 23:00 | Shiho Akita v Alexandra Bozovic | 6-2,3-6,2-6 |
| ITF Women Launceston Qual | 2018/02/04 03:00 | Shiho Akita v Madison Frahn | 6-0,6-2 |
| ITF Women Burnie Qual | 2018/01/28 03:30 | Anastasia Pivovarova v Shiho Akita | 6-3,6-3 |