| UTR Pro Kawaguchi | 2024/03/10 01:30 | Kai Kawano v Hiiro Sakamoto | 4-6,3-6 |
| UTR Pro - Urayasu | 2024/05/10 03:00 | Hiiro Sakamoto v Toa Maeda | 3-6,6-2,5-7 |
| UTR Pro - Urayasu | 2024/05/09 01:30 | Hiiro Sakamoto v Seiya Nakanishi | 7-6,7-6 |
| UTR Pro - Suita | 2024/04/28 00:30 | Natsuki Yamamoto v Hiiro Sakamoto | 6-4,7-6 |
| UTR Pro - Suita | 2024/04/27 07:18 | Nicholas Jovanovski v Hiiro Sakamoto | 4-6,2-3 |
| UTR Pro - Suita | 2024/04/26 02:00 | Hiiro Sakamoto v Seiya Nakanishi | 3-6,6-2,2-6 |
| UTR Pro - Suita | 2024/04/25 05:10 | Hiiro Sakamoto v Taketo Takamisawa | 7-5,2-6,4-6 |
| UTR Pro - Suita | 2024/04/24 04:10 | Jasper Lai v Hiiro Sakamoto | 0-6,0-0 |
| UTR Pro - Suita | 2024/04/23 05:12 | Ryotaro Matsumura v Hiiro Sakamoto | 6-2,6-4 |
| UTR Pro - Urayasu | 2024/05/10 00:00 | Kai Kawano v Yusaku Iwai | 6-0,5-1 |
| UTR Pro - Urayasu | 2024/05/08 00:00 | Kai Kawano v Taketo Takamisawa | 4-6,4-6 |
| UTR Pro - Urayasu | 2024/05/06 00:00 | Takeyasu Sekiguchi v Kai Kawano | 7-5,6-0 |
| UTR Pro - Suita | 2024/04/27 08:30 | Natsuki Yamamoto v Kai Kawano | 7-5,6-2 |
| UTR Pro - Suita | 2024/04/25 00:30 | Kai Kawano v Kazuma Kimura | 4-6,3-6 |
| UTR Pro - Suita | 2024/04/24 00:30 | Kai Kawano v Haruki Katsushima | 4-6,4-6 |
| UTR Pro - Suita | 2024/04/23 00:30 | Kai Kawano v Mizuki Kawada | 6-4,6-3 |
| UTR Pro - Suita | 2024/04/22 00:30 | Kai Kawano v Ko Suzuki | 1-6,6-3,3-6 |