| UTR Pro Tennis Series Miki | 2022/12/08 00:30 | Kento Tagashira v Koki Matsuda | 4-6,4-6 |
| UTR Pro Tennis Series Miki | 2022/12/05 02:00 | Ying-Ze Chen v Koki Matsuda | 2-6,2-5 |
| Challenger Yokkaichi | 2022/11/21 01:00 | Colin Sinclair v Koki Matsuda | 6-3,6-4 |
| Challenger Yokkaichi | 2022/11/20 02:20 | Koki Matsuda v Arjun Kadhe | 7-5,6-7,6-2 |
| Challenger Matsuyama | 2022/11/09 01:00 | Koki Matsuda v Nam Hoang Ly | 4-6,3-6 |
| Challenger Matsuyama | 2022/11/07 03:20 | Yuta Shimizu v Koki Matsuda | 0-6,3-6 |
| Challenger Matsuyama | 2022/11/06 02:40 | Koki Matsuda v Arjun Kadhe | 7-6,6-2 |
| ITF M25 Kashiwa | 2022/09/30 01:00 | Ryota Tanuma v Koki Matsuda | 7-6,6-3 |
| UTR Pro Tennis Series Miki | 2022/12/09 02:00 | Hiiro Sakamoto v Kazuki Nishiwaki | 2-6,2-6 |
| UTR Pro Tennis Series Miki | 2022/12/08 03:30 | Ryohei Takase v Kazuki Nishiwaki | 1-6,1-6 |
| UTR Pro Tennis Series Miki | 2022/12/05 03:30 | Kazuki Nishiwaki v Yudai Watanabe | 0-0 |
| ITF M15 Bhilai | 2022/11/24 07:25 | Vladyslav Orlov v Kazuki Nishiwaki | 6-2,6-2 |
| ITF M15 Bhilai | 2022/11/23 09:15 | Shivank Bhatnagar v Kazuki Nishiwaki | 2-6,2-6 |
| ITF M25 Mumbai | 2022/11/18 06:00 | Dominik Palan v Kazuki Nishiwaki | 6-1,6-2 |
| ITF M25 Mumbai | 2022/11/17 04:25 | Karan Singh v Kazuki Nishiwaki | 6-4,4-6,0-6 |
| ITF M25 Mumbai | 2022/11/16 06:10 | Kazuki Nishiwaki v Manish Sureshkumar | 7-6,6-2 |