Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Jakarta | 2023/01/25 06:30 | Taisei Ichikawa v Yunseok Jang | 6-4,6-1 |
| 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 M25 Daegu | 2023/06/06 01:05 | Yeongseok Jeong v Yunseok Jang | 7-5,4-6,6-1 |
| ITF M15 Nakhon Si Thammarat | 2023/09/07 02:00 | Taisei Ichikawa v James Watt | 4-6,3-6 |
| ITF M15 Nakhon Si Thammarat | 2023/09/05 03:35 | Taisei Ichikawa v Credit Chaiyarin | 6-4,6-4 |
| ITF M15 Nakhon Si Thammarat | 2023/09/01 02:00 | Thanapet Chanta v Taisei Ichikawa | 7-6,7-5 |
| ITF M15 Nakhon Si Thammarat | 2023/08/31 01:55 | Patrik Oplustil v Taisei Ichikawa | 6-4,4-6,3-6 |
| ITF M15 Nakhon Si Thammarat | 2023/08/30 02:00 | Grigoriy Lomakin v Taisei Ichikawa | 6-7,4-6 |
| ITF M25 Tainan | 2023/08/23 02:00 | Taisei Ichikawa v Henrik Wiersholm | 6-7,2-6 |
| ITF M25 Tainan | 2023/08/17 02:00 | Taisei Ichikawa v Lucio Carnevalle | 6-4,6-4 |
| ITF M25 Tainan | 2023/08/15 03:00 | Taisei Ichikawa v Atharva Sharma | 6-3,6-1 |