Stadium: Sub Court B Round: 25 Ground: Hardcourt outdoor
| ITF M25 Calabasas | 2024/03/20 16:55 | Nishesh Basavareddy v Hiroki Sakagawa | 6-1,6-2 |
| ITF M25 Calabasas | 2024/03/19 17:00 | Hiroki Sakagawa v Lodewijk Weststrate | 6-2,6-3 |
| ITF M15 Yanagawa | 2023/12/26 00:30 | Hiroki Sakagawa v Shunsuke Nakagawa | 5-7,4-6 |
| ITF M15 Yanagawa | 2023/12/25 00:30 | Yuichiro Inui v Hiroki Sakagawa | 3-6,3-6 |
| ITF M15 Yanagawa | 2023/12/20 02:30 | Hiroki Sakagawa v Ryotaro Matsumura | 2-6,1-6 |
| ITF M15 Yanagawa | 2023/12/18 01:00 | Kenta Miyoshi v Hiroki Sakagawa | 4-6,6-2,9-11 |
| ITF M25 Sapporo | 2023/09/11 01:00 | Woobin Shin v Hiroki Sakagawa | 0-6,6-3,10-7 |
| ITF M25 Sapporo | 2023/09/10 01:00 | Hiroki Sakagawa v Hiroyasu Ehara | 6-7,6-1,10-6 |
| 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 |
| 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 |