Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Anseong | 2023/06/20 02:00 | Ji Hoon Son v Yunseok Jang | 6-4,3-6,0-6 |
| ITF M25 Changwon | 2023/06/14 02:20 | Yunseok Jang v Uisung Park | 2-6,5-7 |
| ITF M25 Daegu | 2023/06/06 01:05 | Yeongseok Jeong v Yunseok Jang | 7-5,4-6,6-1 |
| Challenger Seoul | 2023/04/23 02:00 | Edan Leshem v Yunseok Jang | 6-3,6-2 |
| ITF M25 Jakarta | 2023/04/20 02:30 | Leo Borg v Yunseok Jang | 6-1,7-5 |
| ITF M25 Jakarta | 2023/04/19 02:30 | Yunseok Jang v Koki Matsuda | 7-5,6-2 |
| ITF M25 Jakarta | 2023/04/18 03:35 | Yunseok Jang v Thantub Suksumrarn | 6-1,1-6,10-6 |
| ITF M25 Jakarta | 2023/04/17 06:25 | Yunseok Jang v Ethan Cook | 6-4,6-0 |
| ITF M25 Anseong | 2023/06/21 05:15 | Naoki Tajima v Yuki Mochizuki | 0-6,1-6 |
| ITF M25 Changwon | 2023/06/18 02:00 | Yuki Mochizuki v Sanhui Shin | 3-6,3-6 |
| ITF M25 Changwon | 2023/06/17 01:55 | Renta Tokuda v Yuki Mochizuki | 1-6,0-6 |
| ITF M25 Changwon | 2023/06/15 02:45 | Jungwoong Na v Yuki Mochizuki | 4-6,3-6 |
| ITF M25 Changwon | 2023/06/13 01:00 | Shunsuke Mitsui v Yuki Mochizuki | 4-6,2-6 |
| ITF M25 Daegu | 2023/06/09 01:00 | Yuki Mochizuki v Takuya Kumasaka | 7-6,4-6,2-6 |
| ITF M25 Daegu | 2023/06/08 00:55 | Yuki Mochizuki v Jae Hwan Kim | 7-6,6-3 |
| ITF M25 Daegu | 2023/06/06 06:05 | Yuki Mochizuki v Min Seong Kim | 6-4,6-4 |