Stadium: Court 2 Round: 62 Ground: Hardcourt outdoor
| ITF Japan F5 | 2017/04/02 01:00 | Tomohiro Masabayashi v Kazuki Nishiwaki | 1-6,6-7 |
| ITF - M15 Monastir | 2021/06/20 09:00 | Kazuki Nishiwaki v Lambling, Raphael | 3-6,4-6 |
| ITF - M15 Monastir | 2021/06/13 08:00 | Kazuki Nishiwaki v Kody Pearson | 4-6,2-6 |
| ITF - M15 Monastir | 2021/06/07 09:00 | Kazuki Nishiwaki v Dong Ju Kim | 2-6,3-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/02 06:00 | Stalder, Reese v Kazuki Nishiwaki | 7-6,7-5 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/26 02:30 | Kazuki Nishiwaki v Kawakami, Rimpei | 6-7,2-6 |
| Challenger Kobe | 2019/11/04 08:30 | Kazuki Nishiwaki v Yosuke Watanuki | 3-6,4-6 |
| Challenger Kobe | 2019/11/04 01:30 | Kazuki Nishiwaki v Khabibulin, Timur | 3-6,1-6 |
| ITF M25 Tay Ninh | 2019/10/10 05:00 | Billy Harris v Kazuki Nishiwaki | 6-4,6-4 |
| ITF - M15 Monastir | 2021/08/15 11:00 | Kawahashi, Yuta v Tomohiro Masabayashi | 6-3,6-3 |
| ITF - M15 Monastir | 2021/08/11 07:30 | Dan Added v Tomohiro Masabayashi | 6-2,6-2 |
| ITF - M15 Monastir | 2021/08/10 07:30 | Coleman Wong v Tomohiro Masabayashi | 5-7,4-6 |
| ITF M15 Cairo | 2021/08/01 12:30 | Samuele Pieri v Tomohiro Masabayashi | 6-2,6-0 |
| ITF M15 Cairo | 2021/07/26 09:00 | Marlon Vankan v Tomohiro Masabayashi | 6-4,6-2 |
| ITF M15 Cairo | 2021/07/25 07:00 | Tomohiro Masabayashi v Syed Naguib, Syed Mohd Agil | 6-4,6-0 |
| Nonthaburi, Simples M-ITF-THA-06A | 2019/11/25 02:30 | Florent Bax v Tomohiro Masabayashi | 6-3,2-6,10-4 |
| Nonthaburi, Simples M-ITF-THA-06A | 2019/11/24 03:50 | Tomohiro Masabayashi v Mathayomchand, Michael | 6-2,6-0 |