Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Monastir | 2021/08/10 07:30 | Beale, Jeremy v Kawahashi, Yuta | 6-4,6-3 |
| ITF - M15 Monastir | 2021/08/09 08:30 | Favero, Lorenzo v Kawahashi, Yuta | 1-6,2-6 |
| ITF - M15 Monastir | 2021/08/08 10:30 | Josh Reid v Kawahashi, Yuta | 3-6,1-6 |
| ITF - M15 Monastir | 2021/05/05 08:30 | Kawahashi, Yuta v Benjamin Lock | 3-6,6-2,4-6 |
| ITF - M15 Monastir | 2021/05/04 08:00 | Kawahashi, Yuta v Frinzi, Mattia | 6-2,7-5 |
| ITF - M15 Monastir | 2021/05/03 12:00 | Kawahashi, Yuta v Pietro Pampanin | 6-4,6-4 |
| ITF - M15 Monastir | 2021/05/02 12:00 | Kawahashi, Yuta v Ammar Elamin | 6-3,6-3 |
| ITF - M15 Monastir | 2021/05/01 08:30 | Kawahashi, Yuta v Lucas Catarina | 3-6,1-6 |
| 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 |
| Nanchang, Singles M-ITF-CHN-16A | 2019/09/30 02:00 | Tomohiro Masabayashi v Changli Zhang | 4-6,7-5,5-10 |