| UTR Pro Tennis Series Miki | 2022/07/07 02:00 | Hiroki Sakagawa v Shin Inoue | 6-4,5-1 |
| UTR Pro Tennis Series Miki | 2022/07/06 05:00 | Yamato Sueoka v Hiroki Sakagawa | 6-3,5-3 |
| UTR Pro Tennis Series Miki | 2022/07/05 05:00 | Tatsuma Ito v Hiroki Sakagawa | 6-4,5-1 |
| UTR Pro Tennis Series - Kalifornie | 2021/05/26 15:00 | Matthew Tsolakyan v Hiroki Sakagawa | 6-2,5-3 |
| UTR Pro Tennis Series - Kalifornie | 2021/05/25 15:00 | Aditya Gupta v Hiroki Sakagawa | 6-3,5-4 |
| UTR Pro Tennis Series - Kalifornie | 2021/05/24 16:30 | Connor Farren v Hiroki Sakagawa | 6-2,6-3 |
| UTR Pro Tennis Series - Kalifornie | 2021/05/23 16:30 | Nathan Oppenheim v Hiroki Sakagawa | 1-6,1-6 |
| UTR Pro Tennis Series Miki | 2022/07/07 02:00 | Yamato Sueoka v Kazuki Nishiwaki | 1-6,2-6 |
| UTR Pro Tennis Series Miki | 2022/07/06 05:00 | Tatsuma Ito v Kazuki Nishiwaki | 7-6,6-4 |
| UTR Pro Tennis Series Miki | 2022/07/04 00:30 | Shin Inoue v Kazuki Nishiwaki | 6-4,3-6,0-6 |
| ITF M15 - Antalya | 2022/04/03 07:00 | Kazuki Nishiwaki v Daniil Ostapenkov | 1-6,7-5,9-11 |
| ITF M15 - Antalya | 2022/03/23 10:30 | Kazuki Nishiwaki v Rudolf Molleker | 1-6,3-6 |
| ITF M15 - Antalya | 2022/03/22 10:55 | Kazuki Nishiwaki v Gabriele Pennaforti | 3-6,4-6 |
| ITF M15 - Antalya | 2022/03/21 08:10 | Kazuki Nishiwaki v Samuil Konov | 6-2,6-3 |
| ITF M15 - Antalya | 2022/03/20 07:00 | Kazuki Nishiwaki v Karim Al-Amin | 6-4,6-3 |