Stadium: Quality(ShirleyLai) Round: 26 Ground: Hardcourt outdoor
| ITF M15 Nishi-Tama | 2019/03/05 05:25 | Naoki Tajima v Shinji Hazawa | 7-5,6-3 |
| ITF M15 Harmon | 2024/06/05 04:30 | Issei Okamura v Naoki Tajima | 6-3,3-6,3-6 |
| ITF M15 Karuizawa | 2024/05/29 02:00 | Kokoro Isomura v Naoki Tajima | 6-2,6-1 |
| ITF M15 Antalya | 2024/05/02 07:00 | Naoki Tajima v Andrin Casanova | 3-6,6-7 |
| ITF M15 Antalya | 2024/04/30 09:20 | Naoki Tajima v Mubarak Shannan Zayid | 6-4,6-1 |
| ITF M15 Antalya | 2024/04/25 08:40 | Naoki Tajima v Deney Wassermann | 1-6,7-6,1-6 |
| ITF M15 Antalya | 2024/04/24 10:00 | Fedor Sosedkin v Naoki Tajima | 2-6,0-6 |
| ITF M15 Kashiwa | 2024/04/01 02:40 | Daisuke Sumizawa v Naoki Tajima | 4-6,6-1,10-8 |
| ITF M15 Kashiwa | 2024/03/31 01:00 | Kenta Nakamura v Naoki Tajima | 2-6,2-6 |
| ITF M15 Karuizawa | 2024/05/29 02:30 | Kohei Hayashi v Shinji Hazawa | 3-6,6-4,10-8 |
| UTR Pro Suita | 2024/04/28 03:16 | Shinji Hazawa v Ryotaro Matsumura | 7-6,6-3 |
| UTR Pro Suita | 2024/04/27 06:00 | Shinji Hazawa v Shinnosuke Iwamoto | 7-6,6-4 |
| UTR Pro Suita | 2024/04/26 02:00 | Wakamatsu Taichi v Shinji Hazawa | 7-5,2-6,2-6 |
| UTR Pro Suita | 2024/04/25 02:00 | Nicholas Jovanovski v Shinji Hazawa | 1-6,5-7 |
| UTR Pro Suita | 2024/04/22 00:30 | Kazuma Kawachi v Shinji Hazawa | 6-7,7-6,1-6 |
| 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 |