| UTR Pro Urayasu | 2024/10/17 00:00 | Seiya Nakanishi v Kazuma Kimura | 4-6,6-4,6-3 |
| UTR Pro Urayasu | 2024/10/16 03:30 | Seiya Nakanishi v Ryota Tanuma | 0-0 |
| UTR Pro Urayasu | 2024/10/15 00:00 | Seiya Nakanishi v Koki Takada | 1-6,0-6 |
| UTR Pro Urayasu | 2024/10/14 00:00 | Seiya Nakanishi v Joel Braund | 6-4,6-7,3-6 |
| ITF M25 Takasaki | 2024/09/15 01:00 | Seiya Nakanishi v Noritaka Koizumi | 5-7,4-6 |
| ITF M25 Sapporo | 2024/09/09 03:30 | Shunsuke Nakagawa v Seiya Nakanishi | 6-2,6-2 |
| ITF M25 Sapporo | 2024/09/08 01:00 | Yusuke Yoshikawa v Seiya Nakanishi | 7-6,6-7,7-10 |
| ITF M25 Sapporo | 2024/09/02 02:35 | Brandon Perez v Seiya Nakanishi | 7-5,6-1 |
| UTR Pro Urayasu | 2024/10/18 05:30 | Shinde Yuzuki v Taiyo Sato | 6-3,5-7,4-6 |
| UTR Pro Urayasu | 2024/10/14 02:30 | Kazuki Sugimoto v Taiyo Sato | 6-4,6-3 |