| ITF M25 Taipei | 2019/07/16 03:50 | Ren Nakamura v Seita Watanabe | 6-4,4-6,5-10 |
| UTR Pro Miki | 2023/02/09 03:30 | Ren Nakamura v Ryotaro Taguchi | 4-6,5-7 |
| UTR Pro Miki | 2023/02/07 06:30 | Ryohei Takase v Ren Nakamura | 1-6,1-6 |
| ITF M25 Traralgon | 2022/11/22 00:00 | Ren Nakamura v Tai Leonard Sach | 5-7,3-6 |
| ITF M25 Traralgon | 2022/11/20 00:00 | Ren Nakamura v Jesse Delaney | 4-6,6-0,10-7 |
| ITF M25 Traralgon | 2022/11/13 00:00 | Thomas Patton v Ren Nakamura | 7-6,4-6,14-12 |
| ITF M25 Jakarta | 2022/11/02 04:05 | Matyas Fuele v Ren Nakamura | 6-4,7-6 |
| ITF M25 Jakarta | 2022/10/31 06:15 | Ren Nakamura v Credit Chaiyarin | 6-4,6-3 |
| ITF M25 Jakarta | 2022/10/31 02:00 | Ren Nakamura v Daniel Leong Prickett | 6-2,6-0 |
| 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 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 |