Stadium: 17 Round: 25 Ground: Hardcourt outdoor
| Challenger Kobe | 2019/11/04 06:30 | Ren Nakamura v Shinji Hazawa | 6-7,0-6 |
| ITF M25 Takasaki | 2024/09/18 06:20 | Shinji Hazawa v Oliver Bonding | 6-4,6-7,4-6 |
| ITF M25 Sapporo | 2024/09/10 03:05 | Masamichi Imamura v Shinji Hazawa | 6-1,6-2 |
| ITF M25 Sapporo | 2024/09/05 04:25 | Goncalo Oliveira v Shinji Hazawa | 6-1,6-2 |
| ITF M25 Sapporo | 2024/09/03 02:00 | Hiroki Sakagawa v Shinji Hazawa | 6-7,3-6 |
| ITF M15 Monastir | 2024/08/14 14:30 | Shinji Hazawa v Savva Polukhin | 2-6,3-6 |
| ITF M15 Monastir | 2024/08/12 17:00 | Shinji Hazawa v Federico Bove | 6-2,6-2 |
| ITF M15 Monastir | 2024/08/12 08:00 | Shinji Hazawa v Rayen Hermassi | 6-0,6-1 |
| ITF M15 Monastir | 2024/08/05 08:00 | Shinji Hazawa v Zaid Mashni | 5-7,2-6 |
| ITF M15 Tanagura | 2024/10/21 00:30 | Ren Nakamura v Geun Jun Kim | 2-6,2-6 |
| ITF M15 Singapore | 2024/09/11 06:20 | Ren Nakamura v Shivank Bhatnagar | 4-6,3-6 |
| ITF M15 Singapore | 2024/09/09 05:15 | Ren Nakamura v Louis Allen | 6-4,6-2 |
| ITF M15 Hong Kong | 2024/09/03 02:00 | Ren Nakamura v Zhan Zheng | 4-6,2-6 |
| ITF M15 Hong Kong | 2024/09/02 02:00 | Ren Nakamura v Sui Lun Wang | 6-0,6-2 |
| ITF M25 Hong Kong | 2024/08/28 03:35 | Ren Nakamura v Colin Sinclair | 6-7,4-6 |
| ITF M25 Hong Kong | 2024/08/27 02:00 | Ren Nakamura v Hao Duan | 7-6,6-1 |
| ITF M25 Hong Kong | 2024/08/26 02:00 | Ren Nakamura v Antoine Voisin | 6-1,6-0 |