Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Takasaki | 2023/09/19 01:00 | Yunseok Jang v Taisei Ichikawa | 1-6,2-6 |
| ITF M25 Sapporo | 2023/09/13 01:00 | Daisuke Sumizawa v Yunseok Jang | 6-3,6-4 |
| ITF M25 Sapporo | 2023/09/05 02:00 | Ryota Tanuma v Yunseok Jang | 6-4,7-5 |
| ITF M15 Nakhon Si Thammarat | 2023/08/29 03:40 | Yunseok Jang v Congsup Congcar | 2-6,0-6 |
| ITF M15 Nakhon Si Thammarat | 2023/08/23 06:30 | Yuttana Charoenphon v Yunseok Jang | 4-6,7-5,7-6 |
| ITF M25 Anseong | 2023/06/22 02:00 | Yunseok Jang v Yuki Mochizuki | 4-6,3-6 |
| 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 M15 Hua Hin | 2023/11/06 05:35 | Zongbing Yu v Natthasith Kunsuwan | 4-6,4-6 |
| ITF M15 Hua Hin | 2023/11/05 06:35 | Alexey Shtengelov v Natthasith Kunsuwan | 6-2,1-6,3-10 |
| ITF M15 Nakhon Si Thammarat | 2023/09/06 03:50 | Sidharth Rawat v Natthasith Kunsuwan | 6-2,6-0 |
| ITF M15 Nakhon Si Thammarat - Kval | 2023/09/04 02:00 | Faisal Qamar v Natthasith Kunsuwan | 4-6,2-6 |
| ITF M15 Nakhon Si Thammarat - Kval | 2023/09/03 03:15 | Sammr Raina v Natthasith Kunsuwan | 6-7,6-4,7-10 |
| ITF M15 Nakhon Si Thammarat | 2023/08/30 02:00 | Natthasith Kunsuwan v Siddhant Banthia | 4-6,6-2,2-6 |
| ITF M15 Shanghai | 2023/07/11 03:50 | Natthasith Kunsuwan v Yanjie Zheng | 2-6,2-6 |
| ITF M15 Shanghai | 2023/07/10 09:55 | Natthasith Kunsuwan v Victor Kuznetsov | 6-4,6-3 |