Stadium: Court 2 Round: 25 Ground: Clay
| ITF - Karuizawa M15 | 2023/05/30 02:00 | Jumpei Yamasaki v Daiki Yoshimura | 6-2,6-2 |
| ITF - Heraklion M15 | 2022/10/14 08:50 | Simone Roncalli v Jumpei Yamasaki | 6-4,6-3 |
| ITF - Heraklion M15 | 2022/10/13 08:40 | Thantub Suksumrarn v Jumpei Yamasaki | 6-7,2-6 |
| ITF - Heraklion M15 | 2022/10/12 11:40 | Gianluca Cadenasso v Jumpei Yamasaki | 6-7,3-6 |
| UTR Pro Tennis Series Miki | 2022/07/09 00:30 | Asahi Harazaki v Jumpei Yamasaki | 7-5,5-2 |
| UTR Pro Tennis Series Miki | 2022/07/08 00:30 | Yuichiro Inui v Jumpei Yamasaki | 3-6,6-3,4-6 |
| UTR Pro Tennis Series Miki | 2022/07/07 04:58 | Kento Tagashira v Jumpei Yamasaki | 4-6,3-6 |
| UTR Pro Tennis Series Miki | 2022/07/05 00:30 | Reiya Komagata v Jumpei Yamasaki | 0-6,3-6 |
| UTR Pro - Miki | 2023/02/12 02:00 | Tomohiro Masabayashi v Seita Watanabe | 4-6,1-5 |
| UTR Pro - Miki | 2023/02/11 03:30 | Yuichiro Inui v Seita Watanabe | 6-7,6-7 |
| UTR Pro - Miki | 2023/02/10 04:30 | Ren Nakamura v Seita Watanabe | 5-7,2-6 |
| UTR Pro - Miki | 2023/02/09 03:30 | Kosuke Shibano v Seita Watanabe | 2-6,1-6 |
| UTR Pro - Miki | 2023/02/08 03:30 | Ryohei Takase v Seita Watanabe | 2-6,1-5 |
| UTR Pro - Miki | 2023/02/06 03:30 | Ryotaro Taguchi v Seita Watanabe | 6-2,6-7,7-6 |
| Challenger Kobe | 2022/11/13 01:00 | Mukund Sasikumar v Seita Watanabe | 6-3,6-1 |
| ITF - Dżakarta M25 | 2022/10/27 02:00 | Thomas Fancutt v Seita Watanabe | 7-5,7-5 |