Stadium: Court D Round: 54 Ground: Hardcourt outdoor
| ITF - W25 Changwon | 2019/05/13 01:00 | Ayumi Koshiishi v Si On Park | 6-0,6-1 |
| ITF - W60 Fukuoka | 2019/05/06 01:00 | Mai Hontama v Ayumi Koshiishi | 3-6,6-3,10-2 |
| ITF - W25 Hong Kong | 2019/04/08 02:00 | Ayumi Koshiishi v Mihika Yadav | 6-3,2-6,4-10 |
| ITF W25 Jackson | 2019/04/03 16:40 | Ayumi Koshiishi v Ann Li | 1-6,2-6 |
| ITF W25 Jackson | 2019/04/02 15:00 | Ayumi Koshiishi v Alesya Yakubovich | 6-3,6-2 |
| ITF - W25 Canberra | 2019/03/25 00:00 | Ayumi Koshiishi v Yuuki Tanaka | 3-6,1-6 |
| ITF W15 Xiamen | 2019/03/22 03:35 | Ayumi Koshiishi v Eudice Chong | 2-6,3-6 |
| ITF W15 Xiamen | 2019/03/20 02:00 | Ayumi Koshiishi v Ashmitha Easwaramurthi | 6-0,6-1 |
| ITF - W25 Changwon | 2019/05/13 01:00 | Dami Lee v Dabin Oh | 2-6,3-6 |
| ITF Women Yeongwol | 2018/09/05 04:45 | Ha Yeong Ryu v Dabin Oh | 6-3,7-6 |
| ITF Women Yeongwol | 2018/08/29 07:25 | Dabin Oh v Dabin Kim | 2-6,5-7 |
| ITF Women Gimcheon | 2018/08/23 01:00 | Yu Jin Ahn v Dabin Oh | 6-1,6-1 |
| ITF Women Gimcheon | 2018/08/21 01:00 | Dabin Oh v Jeongyun Lee | 6-4,6-3 |
| ITF Women Gimcheon | 2018/08/12 01:00 | Dabin Oh v Mijeong Park | 2-6,7-5,2-6 |
| ITF Women Daegu Qual | 2018/06/18 02:00 | Zhibek Kulambayeva v Dabin Oh | 6-1,6-3 |
| ITF Women Gyeongsan Qual | 2018/06/11 01:00 | I-Hsuan Cho v Dabin Oh | 2-6,6-2,6-1 |