Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Heraklion | 2022/10/14 08:50 | Simone Roncalli v Jumpei Yamasaki | 6-4,6-3 |
| ITF M15 Heraklion | 2022/10/13 08:40 | Thantub Suksumrarn v Jumpei Yamasaki | 6-7,2-6 |
| ITF M15 Heraklion | 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 Tennis Series Miki | 2022/07/04 02:00 | Jumpei Yamasaki v Ryotaro Matsumura | 6-4,6-2 |
| Challenger Kobe | 2022/11/13 01:00 | Mukund Sasikumar v Seita Watanabe | 6-3,6-1 |
| ITF M25 Jakarta | 2022/10/27 02:00 | Thomas Fancutt v Seita Watanabe | 7-5,7-5 |
| ITF M25 Jakarta | 2022/10/26 04:20 | Congsup Congcar v Seita Watanabe | 2-6,2-6 |
| Challenger Busan | 2022/10/16 01:30 | Max Purcell v Seita Watanabe | 6-0,6-2 |
| Challenger Seoul | 2022/10/09 05:25 | Hiroki Moriya v Seita Watanabe | 6-3,6-2 |
| Challenger Gwangju | 2022/10/03 04:00 | Yunseong Chung v Seita Watanabe | 6-2,7-6 |
| Challenger Gwangju | 2022/10/02 06:00 | Woohyuk Sim v Seita Watanabe | 2-6,0-6 |
| ITF M25 Kashiwa | 2022/09/29 01:00 | Rio Noguchi v Seita Watanabe | 6-7,6-3,6-3 |