| ITF M15 Kashiwa | 2024/04/02 04:30 | Jake Delaney v Kazuma Kawachi | 6-1,6-2 |
| ITF M15 Tsukuba | 2024/03/25 06:30 | Kazuma Kawachi v Kousuke Ogura | 7-6,0-6,10-12 |
| ITF M15 Tsukuba | 2024/03/24 01:00 | Hanyi Liu v Kazuma Kawachi | 4-6,3-6 |
| ITF M15 Chandigarh | 2024/03/19 06:00 | Bang Shuo Yin v Kazuma Kawachi | 6-2,6-2 |
| ITF M25 New Delhi | 2024/03/13 05:20 | Bang Shuo Yin v Kazuma Kawachi | 6-4,6-3 |
| UTR Pro Kawaguchi | 2024/03/03 00:30 | Kazuma Kawachi v Ryotaro Matsumura | 6-2,6-3 |
| UTR Pro Kawaguchi | 2024/03/02 03:00 | Takuya Kumasaka v Kazuma Kawachi | 4-5 |
| ITF M15 Yanagawa | 2023/12/27 00:30 | Takuya Kumasaka v Kazuma Kawachi | 6-4,6-2 |
| Challenger Yokohama | 2023/11/19 07:00 | Kalin Ivanovski v Shinji Hazawa | 3-6,6-4,7-5 |
| Challenger Kobe | 2023/11/13 02:55 | Giovanni Fonio v Shinji Hazawa | 6-3,6-7,6-1 |
| ITF M15 Nakhon Si Thammarat | 2023/07/14 03:40 | Shinji Hazawa v Sidharth Rawat | 6-4,5-7,3-6 |
| ITF M15 Nakhon Si Thammarat | 2023/07/13 02:00 | Shinji Hazawa v Amir Milushev | 6-1,4-6,6-4 |
| ITF M15 Nakhon Si Thammarat | 2023/07/12 02:00 | Shinji Hazawa v Chase Ferguson | 6-7,6-1,6-2 |
| ITF M15 Nakhon Si Thammarat | 2023/07/06 06:25 | Shinji Hazawa v Ji Hoon Son | 6-3,3-6,6-7 |
| ITF M15 Nakhon Si Thammarat | 2023/07/04 02:00 | Shinji Hazawa v Sidharth Rawat | 6-3,6-1 |
| ITF M25 Nakhon Si Thammarat | 2023/06/16 02:00 | Shinji Hazawa v Hiroki Moriya | 4-6,5-7 |