| ITF - Japão F8 | 2018/06/09 01:00 | Seita Watanabe v Tomohiro Masabayashi | 7-6,5-7,4-6 |
| UTR Pro - Miki | 2023/02/11 02:00 | Tomohiro Masabayashi v Natsuki Yamamoto | 6-0,6-3 |
| UTR Pro - Miki | 2023/02/10 00:30 | Tomohiro Masabayashi v Riki Takahata | 6-3,6-3 |
| UTR Pro - Miki | 2023/02/09 02:00 | Tomohiro Masabayashi v Shion Itsusaki | 6-1,6-4 |
| UTR Pro - Miki | 2023/02/08 02:00 | Sora Fukuda v Tomohiro Masabayashi | 6-4,6-4 |
| UTR Pro - Miki | 2023/02/07 00:30 | Shun Oue v Tomohiro Masabayashi | 2-6,4-6 |
| ITF - M25 Jacarta | 2022/11/01 02:00 | Coleman Wong v Tomohiro Masabayashi | 6-3,7-6 |
| ITF - M25 Jacarta | 2022/10/25 04:05 | Tomohiro Masabayashi v Konstantin Kravchuk | 6-7,3-6 |
| ITF - M25 Tay Ninh | 2022/10/06 02:00 | Coleman Wong v Tomohiro Masabayashi | 6-3,6-0 |
| 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 - M25 Jacarta | 2022/10/27 02:00 | Thomas Fancutt v Seita Watanabe | 7-5,7-5 |
| ITF - M25 Jacarta | 2022/10/26 04:20 | Congsup Congcar v Seita Watanabe | 2-6,2-6 |