| 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 Kawaguchi | 2024/08/18 00:00 | Seiya Nakanishi v Kazuki Sugimoto | 3-6,2-6 |
| UTR Pro Kawaguchi | 2024/08/17 00:00 | Sora Fukuda v Seiya Nakanishi | 3-6,0-6 |
| UTR Pro Urayasu | 2024/10/15 03:00 | Joel Braund v Ryota Tanuma | 0-0 |
| ITF M25 Takasaki | 2024/09/18 03:30 | Ryota Tanuma v Yusuke Takahashi | 2-6,2-6 |
| ITF M25 Takasaki | 2024/09/16 01:00 | Ryota Tanuma v Noritaka Koizumi | 6-2,6-7,10-4 |
| ITF M25 Sapporo | 2024/09/11 03:00 | Ryota Tanuma v Ryotaro Taguchi | 3-6,6-4,5-7 |
| ITF M25 Nakhon Si Thammarat | 2024/08/29 03:15 | Ryota Tanuma v Uisung Park | 6-7,3-6 |
| ITF M25 Nakhon Si Thammarat | 2024/08/27 02:00 | Hiroki Moriya v Ryota Tanuma | 0-6,6-4,3-6 |
| ITF M15 Nakhon Si Thammarat | 2024/08/20 04:05 | Ryota Tanuma v Leo Borg | 1-6,3-6 |
| ITF M15 Tokyo | 2024/07/13 05:30 | Ryota Tanuma v Shintaro Imai | 3-6,5-7 |