Stadium: Court 5 Round: 62 Ground: Clay
| ITF - M25 Changwon | 2023/06/12 08:30 | Junhyun Lee v Dong Ju Kim | 3-6,6-3,13-11 |
| ITF - M25 Changwon | 2023/06/12 05:30 | Woohyuk Sim v Dong Ju Kim | 6-3,3-6,11-13 |
| ITF - M25 Changwon | 2023/06/11 08:30 | Ki Bum Kim v Dong Ju Kim | 6-4,1-6,10-12 |
| ITF - M25 Daegu | 2023/06/08 01:00 | Dong Ju Kim v Jeamoon Lee | 3-6,3-6 |
| ITF - M25 Daegu | 2023/06/07 02:40 | Keisuke Saitoh v Dong Ju Kim | 1-6,2-6 |
| ITF - M25 Daegu | 2023/06/05 06:40 | Dong Ju Kim v Woodam Song | 6-1,6-2 |
| ITF - M25 Daegu | 2023/06/05 02:50 | Dong Ju Kim v Byeonghun Kim | 6-2,6-2 |
| ITF - M25 Daegu | 2023/06/04 01:00 | Dong Ju Kim v Young Seok Lee | 6-2,3-6,10-7 |
| ITF - M25 Changwon | 2023/06/11 08:00 | Young Seok Lee v Junsu Kang | 2-6,6-1,10-5 |
| ITF - M25 Daegu | 2023/06/05 07:10 | Suk Hyun Choo v Junsu Kang | 6-3,7-5 |
| ITF - M25 Jakarta | 2023/05/29 04:35 | Tegar A S Wibowo v Junsu Kang | 6-3,5-7,10-4 |