Stadium: Court 3 Round: 54 Ground: Hardcourt outdoor
| ITF Women Sangju | 2018/06/06 01:00 | Ayaka Okuno v Hyojung Yea | 6-3,6-3 |
| ITF Women Yeongwol | 2018/09/04 03:00 | Eunji Lim v Hyojung Yea | 6-4,1-6,4-6 |
| ITF Women Yeongwol | 2018/08/30 03:05 | Hyojung Yea v Dabin Kim | 4-6,3-6 |
| ITF Women Yeongwol | 2018/08/29 07:30 | Da Ye Kim v Hyojung Yea | 4-6,2-6 |
| ITF Women Gimcheon | 2018/08/23 05:30 | Sohyun Park v Hyojung Yea | 7-5,3-6,6-4 |
| ITF Women Gimcheon | 2018/08/16 01:00 | Hyojung Yea v Se-Hyun Kim | 0-6,2-6 |
| ITF Women Gimcheon | 2018/08/15 01:00 | Hyojung Yea v Heejin Han | 6-2,7-5 |
| ITF Women Daegu Qual | 2018/06/19 01:00 | Zhibek Kulambayeva v Hyojung Yea | 4-6,7-6,7-5 |
| ITF Women Daegu Qual | 2018/06/18 03:25 | Hyojung Yea v Chihiro Takayama | 6-3,6-0 |
| ITF - W25 Incheon | 2019/05/29 02:55 | Ji-Hee Choi v Ayaka Okuno | 6-3,3-6,6-2 |
| ITF - W25 Incheon | 2019/05/28 01:00 | Eunseo Yun v Ayaka Okuno | 1-6,0-6 |
| ITF - W25 Incheon | 2019/05/27 03:30 | Anna Laguza v Ayaka Okuno | 4-6,6-0,8-10 |
| ITF - W25 Karuizawa | 2019/05/21 05:40 | Ari Matsumoto v Ayaka Okuno | 4-6,6-2,10-7 |
| ITF - W25 Karuizawa | 2019/05/20 03:00 | Shiho Hisamatsu v Ayaka Okuno | 4-6,2-6 |
| ITF - W60 Kurume | 2019/05/13 01:55 | Alexandra Bozovic v Ayaka Okuno | 6-3,6-3 |
| ITF - W60 Fukuoka | 2019/05/06 03:05 | Ayaka Okuno v Leonie Kung | 3-6,3-6 |
| ITF W80 Charlottesville | 2019/04/23 16:20 | Emily Fanning v Ayaka Okuno | 4-6,6-2,10-3 |