Stadium: Court 2 Round: 26 Ground: Clay
| ITF M25 Dharwad | 2023/10/18 09:25 | Kazuki Nishiwaki v Ryotaro Matsumura | 6-2,7-5 |
| ITF M15 Caloundra | 2023/08/01 03:40 | Kazuki Nishiwaki v Ryotaro Matsumura | 6-3,3-6,6-3 |
| UTR Pro Tennis Series Miki | 2022/07/10 00:30 | Kazuki Nishiwaki v Ryotaro Matsumura | 6-1,5-4 |
| ITF M15 Karuizawa | 2024/05/29 02:00 | Ryotaro Matsumura v Taiyo Yamanaka | 6-3,4-6,12-10 |
| ITF M25 Anning | 2024/05/21 04:30 | Ryotaro Matsumura v Nico Hornitschek | 3-6,1-6 |
| ITF M25 Anning | 2024/05/20 06:00 | Ryotaro Matsumura v Min Seong Kim | 6-3,6-1 |
| ITF M25 Anning | 2024/05/19 01:30 | Ryotaro Matsumura v Xirui Han | 7-5,6-3 |
| ITF M25 Luan | 2024/05/15 03:25 | Ryotaro Matsumura v Fajing Sun | 3-6,1-6 |
| ITF M25 Luan | 2024/05/13 04:45 | Ryotaro Matsumura v Hao Duan | 6-2,6-0 |
| ITF M25 Luan | 2024/05/12 02:00 | Ryotaro Matsumura v Jiaji Wang | 6-3,6-1 |
| ITF M25 Luan | 2024/05/12 02:00 | Ryotaro Matsumura v Yukun Wang | 6-3,6-4 |
| ITF M15 Karuizawa | 2024/05/29 02:30 | Jay Lin Gibson v Kazuki Nishiwaki | 2-6,6-4,7-10 |
| ITF M15 Bucharest | 2024/05/23 10:35 | Illya Beloborodko v Kazuki Nishiwaki | 3-6,6-4,6-2 |
| ITF M15 Bucharest | 2024/05/21 08:00 | Christian Teszari v Kazuki Nishiwaki | 1-6,3-6 |
| ITF M15 Bucharest | 2024/05/14 09:35 | Dan Alexandru Tomescu v Kazuki Nishiwaki | 6-1,6-0 |
| ITF M15 Bucharest | 2024/05/07 09:30 | Carlo A Caniato v Kazuki Nishiwaki | 2-0 |
| ITF M15 Shymkent | 2024/04/25 04:00 | Kazuki Nishiwaki v Savva Polukhin | 2-6,0-6 |
| ITF M15 Shymkent | 2024/04/24 08:45 | Kazuki Nishiwaki v Yuichiro Inui | 7-6,6-3 |
| ITF M15 Shymkent | 2024/04/17 11:25 | Kazuki Nishiwaki v Dev Javia | 6-3,6-7,4-6 |