Stadium: Center Court Round: 25 Ground: Hardcourt outdoor
| Challenger Shanghai | 2019/09/10 02:30 | Kazuki Nishiwaki v Jumpei Yamasaki | 3-6,2-6 |
| Challenger Yokkaichi | 2023/11/26 04:20 | Calum Puttergill v Kazuki Nishiwaki | 7-5,6-2 |
| Challenger Matsuyama | 2023/11/05 04:55 | Kazuki Nishiwaki v Rio Noguchi | 2-6,5-7 |
| ITF M25 Dharwad | 2023/10/20 04:30 | Kazuki Nishiwaki v Digvijay Pratap Singh | 4-6,7-6,2-6 |
| ITF M25 Dharwad | 2023/10/19 04:35 | Kazuki Nishiwaki v Madhwin Kamath | 6-4,6-4 |
| ITF M25 Dharwad | 2023/10/18 09:25 | Kazuki Nishiwaki v Ryotaro Matsumura | 6-2,7-5 |
| ITF M25 Takasaki | 2023/09/22 01:00 | Kazuki Nishiwaki v Collin Altamirano | 3-6,1-6 |
| ITF M25 Takasaki | 2023/09/21 01:50 | Kazuki Nishiwaki v Leo Vithoontien | 5-7,6-4,6-4 |
| ITF M25 Takasaki | 2023/09/20 02:40 | Kazuki Nishiwaki v Taisei Miyamoto | 6-3,6-0 |
| ITF M15 Yanagawa | 2023/12/22 04:50 | Jumpei Yamasaki v Hikaru Shiraishi | 3-6,4-6 |
| ITF M15 Yanagawa | 2023/12/21 08:45 | Koki Matsuda v Jumpei Yamasaki | 1-6,6-1,3-6 |
| ITF M15 Yanagawa | 2023/12/21 00:30 | Shu Muto v Jumpei Yamasaki | 0-6,2-6 |
| ITF M25 Gold Coast | 2023/11/30 01:15 | Kody Pearson v Jumpei Yamasaki | 7-6,7-6 |
| ITF M25 Gold Coast | 2023/11/28 01:50 | Jumpei Yamasaki v Nam Hoang Ly | 2-6,6-4,6-3 |
| ITF M25 Brisbane | 2023/11/22 04:35 | Makoto Ochi v Jumpei Yamasaki | 7-6,6-3 |
| ITF M15 Kuching | 2023/11/16 05:35 | Hikaru Shiraishi v Jumpei Yamasaki | 7-5,6-1 |
| ITF M15 Kuching | 2023/11/15 04:20 | Jumpei Yamasaki v Thijmen Loof | 7-6,7-6 |