Stadium: Court F Round: 27 Ground: Hardcourt outdoor
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/22 03:00 | Chiang, Yuki Kristina v Okuno, Ayaka | 6-1,5-7,1-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/20 02:40 | Erina Hayashi v Okuno, Ayaka | 0-6,7-6,3-6 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Okuno, Ayaka v Kyoka Okamura | 1-6,3-6 |
| Yokohama, Singles Qualifying W-WITF-JPN-01B | 2018/03/04 07:00 | Okuno, Ayaka v Ya-Hsuan Lee | 4-6,4-6 |
| Surprise, Singles Qualifying W-WITF-USA-05A | 2018/02/11 17:00 | Giuliana Olmos v Okuno, Ayaka | 6-2,1-6,6-2 |
| ITF Women Hong Kong | 2018/01/02 04:10 | Luksika Kumkhum v Okuno, Ayaka | 6-1,6-2 |
| ITF Women Toyota Qual | 2017/11/12 02:00 | Okuno, Ayaka v Ohya, Nozomi | 2-6,3-6 |
| ITF Women Shenzhen Qual | 2017/11/06 03:00 | Okuno, Ayaka v Zhuoma Ni Ma | 1-6,7-6,2-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/20 06:15 | Furuya, Michiru v Lee, So-Ra | 7-5,6-7,4-6 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/19 01:00 | Lee, So-Ra v Takayama, Chihiro | 6-3,7-5 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/18 01:00 | Lee, So-Ra v Sakura Hosogi | 6-1,7-5 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Lee, So-Ra v Ya-Hsuan Lee | 6-7,3-6 |
| Fed Cup, Groupe Mondial | 2018/02/10 04:30 | Yang, Zhaoxuan v Lee, So-Ra | 6-3,6-2 |
| ITF Women Shenzhen Qual | 2017/11/07 02:00 | Neel, Ingrid v Lee, So-Ra | 6-2,6-1 |
| ITF Women Shenzhen Qual | 2017/11/06 04:45 | Lee, So-Ra v Chengyiyi Yuan | 6-1,6-2 |
| ITF Women Shenzhen Qual | 2017/11/05 07:10 | Lee, So-Ra v Kong, Qianxin | 6-0,6-2 |