Stadium: Court 2 Round: 24 Ground: Hardcourt outdoor
| Challenger Liuzhou | 2018/10/20 05:55 | Shi Hong Zeng v Cheong-Eui Kim | 6-4,6-4 |
| Challenger Shanghai | 2018/09/08 03:00 | N. Vijay Sundar Prashanth v Cheong-Eui Kim | 6-4,6-3 |
| ITF Korea F5 | 2018/08/25 01:00 | Cheong-Eui Kim v Ji Sung Nam | 2-6,3-6 |
| ITF Korea F5 | 2018/08/24 01:15 | Cheong-Eui Kim v Jae Hwan Kim | 6-3,6-3 |
| ITF Korea F5 | 2018/08/23 02:00 | Cheong-Eui Kim v Seong Taek Im | 7-6,6-0 |
| ITF Korea F5 | 2018/08/21 03:15 | Cheong-Eui Kim v Juan Ignacio Batalla | 6-1,6-2 |
| Challenger Gwangju | 2018/08/14 01:00 | Cheong-Eui Kim v Sidharth Rawat | 5-7,7-6,2-6 |
| ITF Indonesia F2 | 2018/08/03 02:00 | Cheong-Eui Kim v Kaito Uesugi | 4-6,6-7 |
| ITF Japan F1 | 2018/03/05 01:00 | Rio Noguchi v Naoto Kai | 6-1,4-6,6-2 |
| ITF Japan F1 | 2018/03/04 01:00 | Naoto Kai v Kaito Itsusaki | 6-7,6-2,6-3 |
| ITF Japan F1 | 2018/03/03 01:00 | Kosuke Okagaki v Naoto Kai | 6-4,0-6,2-6 |
| Challenger Yokohama Qual | 2018/02/24 03:55 | Takanyi Garanganga v Naoto Kai | 6-3,4-6,7-6 |
| ITF Japan F8 | 2017/06/10 05:00 | Steven Goh v Naoto Kai | 6-3,6-2 |
| ITF Japan F7 | 2017/06/06 01:00 | Shintaro Imai v Naoto Kai | 6-1,6-2 |
| ITF Japan F6 Qual | 2017/05/27 01:00 | Ibuki Furuta v Naoto Kai | 6-2,6-0 |
| ITF Japan F4 | 2017/03/25 00:00 | Yuki Nakamura v Naoto Kai | 6-4,4-6,6-1 |