Stadium: Court 6 Round: 44
| ITF Women Sangju Qual | 2018/06/03 02:00 | Eri Shimizu v Koike, Satsuki | 2-6,7-5,6-3 |
| ITF Women Fukuoka Qual | 2018/05/06 01:00 | Nagi Hanatani v Koike, Satsuki | 6-1,6-4 |
| ITF Women Gifu Qual | 2018/04/29 04:20 | Hiroko Kuwata v Koike, Satsuki | 6-4,6-1 |
| ITF Women Gifu Qual | 2018/04/29 01:00 | Koike, Satsuki v Hasegawa, Mami | 6-1,6-0 |
| ITF Women Osaka Qual | 2018/04/08 03:30 | Koike, Satsuki v Dabin Kim | 2-6,5-7 |
| ITF Women Osaka Qual | 2018/04/07 01:30 | Koike, Satsuki v Furukawa, Suzuka | 6-0,0-6,6-4 |
| ITF Women Nanjing Qual | 2018/03/24 05:30 | Koike, Satsuki v Emma Raducanu | 0-6,0-6 |
| ITF Women Nanjing | 2018/03/17 02:30 | Koike, Satsuki v Scandalis, Zoe Gwen | 5-7,4-6 |
| ITF Women Goyang Qual | 2018/05/07 00:30 | Kwon, Mi Jeong v Lee, Jeongyun | 4-6,0-6 |
| ITF Women Yeongwol | 2017/09/07 02:25 | Lee, So-Ra v Lee, Jeongyun | 6-3,6-4 |
| ITF Women Yeongwol | 2017/09/06 03:25 | Lee, Jeongyun v Sim, Sol Hee | 7-6,6-1 |
| ITF Women Yeongwol | 2017/09/05 01:00 | Kwon, Mi Jeong v Lee, Jeongyun | 5-7,3-6 |
| ITF Women Yeongwol | 2017/09/04 02:00 | Youn, Eunseo v Lee, Jeongyun | 0-6,0-6 |
| ITF Women Yeongwol | 2017/08/31 01:00 | Dabin Kim v Lee, Jeongyun | 6-1,6-2 |
| ITF Women Yeongwol | 2017/08/30 03:20 | Lee, Jeongyun v Zhao, Xiaoxi | 6-4,6-2 |
| ITF Women Yeongwol | 2017/08/29 01:00 | Yexin Ma v Lee, Jeongyun | 6-4,0-6,4-6 |