Stadium: Court 6 Round: 27
| ITF Women Yokohama Qual | 2018/03/04 07:00 | Ayaka Okuno v Ya-Hsuan Lee | 4-6,4-6 |
| ITF Women Sangju | 2018/06/07 03:05 | Ayaka Okuno v Subin Park | 7-6,6-4 |
| ITF Women Sangju | 2018/06/06 01:00 | Ayaka Okuno v Hyojung Yea | 6-3,6-3 |
| ITF Women Karuizawa | 2018/05/24 03:55 | Ayaka Okuno v Abbie Myers | 2-6,3-6 |
| 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 Sangju | 2018/06/07 01:00 | Dan Ni Wang v Ya-Hsuan Lee | 1-6,2-6 |
| ITF Women Sangju | 2018/06/06 04:05 | Dayeon Back v Ya-Hsuan Lee | 1-6,0-6 |
| ITF Women Changwon | 2018/05/27 02:00 | Varvara Flink v Ya-Hsuan Lee | 6-0,3-6,0-6 |
| ITF Women Changwon | 2018/05/26 01:00 | Ya-Hsuan Lee v Ulrikke Eikeri | 6-1,6-2 |
| ITF Women Changwon | 2018/05/25 01:00 | So-Ra Lee v Ya-Hsuan Lee | 4-6,4-6 |
| ITF Women Changwon | 2018/05/24 02:40 | Ayumi Koshiishi v Ya-Hsuan Lee | 4-6,3-6 |
| ITF Women Changwon | 2018/05/23 05:05 | Ya-Hsuan Lee v Na-Lae Han | 6-4,6-3 |
| ITF Women Incheon | 2018/05/17 01:30 | Na-Lae Han v Ya-Hsuan Lee | 4-6,6-3,7-6 |