Round: 26 Ground: Hardcourt outdoor
| Challenger Burnie | 2024/01/30 00:25 | Rinky Hijikata v Takuya Kumasaka | 6-4,6-2 |
| Challenger Burnie | 2024/01/29 00:20 | Takuya Kumasaka v Corey Gaal | 7-6,4-6,7-6 |
| Challenger Burnie | 2024/01/28 03:40 | Takuya Kumasaka v Naoki Tajima | 6-4,7-6 |
| ITF M15 Yanagawa | 2023/12/29 00:50 | Jumpei Yamasaki v Takuya Kumasaka | 6-1,6-4 |
| ITF M15 Yanagawa | 2023/12/27 00:30 | Takuya Kumasaka v Kazuma Kawachi | 6-4,6-2 |
| ITF M15 Yanagawa | 2023/12/22 02:45 | Takuya Kumasaka v Taisei Ichikawa | 4-6,4-6 |
| ITF M15 Yanagawa | 2023/12/21 02:50 | Takuya Kumasaka v Yuta Tomida | 7-6,6-0 |
| ITF M15 Ipoh Perak | 2023/11/26 01:30 | Alexey Zakharov v Takuya Kumasaka | 6-0,6-3 |
| Challenger Nonthaburi | 2024/01/08 05:40 | Yunseong Chung v Christian Langmo | 2-6,0-6 |
| Challenger Nonthaburi | 2024/01/07 07:20 | Yunseong Chung v Congsup Congcar | 7-5,6-1 |
| Challenger Nonthaburi | 2023/12/31 06:25 | Yunseong Chung v Kaichi Uchida | 4-6,0-6 |
| Challenger Yokohama | 2023/11/21 07:20 | Yunseong Chung v Luca Nardi | 2-6,4-6 |
| Challenger Yokohama | 2023/11/20 03:35 | Yasutaka Uchiyama v Yunseong Chung | 6-4,6-7,7-6 |
| Challenger Yokohama | 2023/11/19 05:25 | Fajing Sun v Yunseong Chung | 4-6,4-6 |
| Challenger Kobe | 2023/11/14 01:30 | Renta Tokuda v Yunseong Chung | 6-4,1-6,2-6 |
| Challenger Kobe | 2023/11/13 01:30 | Rio Noguchi v Yunseong Chung | 1-6,4-6 |