stadio: Court 7 Round: 25 Ground: Clay
| ITF Egitto F28 | 2017/09/30 16:00 | Yuichiro Inui v Kazuki Nishiwaki | 3-6,2-6 |
| ITF M15 Shymkent | 2024/04/17 11:25 | Kazuki Nishiwaki v Dev Javia | 6-3,6-7,4-6 |
| ITF M15 Kashiwa | 2024/04/04 04:45 | Kazuki Nishiwaki v Ryotaro Taguchi | 3-6,4-6 |
| ITF M15 Kashiwa | 2024/04/02 02:10 | Toshihide Matsui v Kazuki Nishiwaki | 7-6,4-6,4-6 |
| ITF M15 Tsukuba | 2024/03/27 00:50 | Yi Zhou v Kazuki Nishiwaki | 4-6,6-4,6-3 |
| ITF M15 Nishi-Tokyo | 2024/03/20 06:30 | Leo Vithoontien v Kazuki Nishiwaki | 6-2,6-3 |
| ITF M15 Torello | 2024/03/07 11:40 | Kazuki Nishiwaki v Ergi Kirkin | 1-6,1-6 |
| ITF M15 Torello | 2024/03/06 12:40 | Kazuki Nishiwaki v Manel L Juncadella | 6-4,6-2 |
| ITF M15 Villena | 2024/02/27 12:00 | Fausto Tabacco v Kazuki Nishiwaki | 6-3,6-1 |
| ITF M15 Shymkent | 2024/04/23 06:30 | Yuichiro Inui v Bingyu Yu | 6-3,7-6 |
| ITF M15 Shymkent | 2024/04/22 06:30 | Yuichiro Inui v Giorgi Giorgadze | 6-2,6-3 |
| ITF M15 Shymkent | 2024/04/16 11:20 | Yuichiro Inui v Leonardo Catani | 6-3,2-6,8-10 |
| ITF M15 Shymkent | 2024/04/16 06:05 | Yuichiro Inui v Giorgi Giorgadze | 6-0,7-6 |
| ITF M15 Chandigarh | 2024/03/19 07:45 | Sidharth Rawat v Yuichiro Inui | 7-6,4-6,6-1 |
| ITF M25 New Delhi | 2024/03/14 03:55 | Yuichiro Inui v Wishaya Trongcharoenchaikul | 4-6,4-6 |
| ITF M25 New Delhi | 2024/03/13 07:25 | Jagmeet Singh v Yuichiro Inui | 0-6,1-6 |
| ITF M15 Yanagawa | 2023/12/25 00:30 | Yuichiro Inui v Hiroki Sakagawa | 3-6,3-6 |