| ITF M25 Sapporo | 2023/09/04 03:35 | Ryusuke Horiuchi v Seiya Nakanishi | 6-4,2-6,10-12 |
| UTR Pro Urayasu | 2024/10/19 03:10 | Seiya Nakanishi v Taiyo Sato | 4-6,6-3,6-4 |
| 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 |
| UTR Pro Urayasu | 2024/10/19 00:00 | Takeshi Maruta v Ryusuke Horiuchi | 6-7,2-6 |
| UTR Pro Urayasu | 2024/10/18 06:00 | Koki Matsuda v Ryusuke Horiuchi | 6-4,6-2 |
| UTR Pro Urayasu | 2024/10/17 00:00 | Kohtaro Kuriyama v Ryusuke Horiuchi | 7-6,1-6,3-6 |
| UTR Pro Urayasu | 2024/10/16 00:00 | Kai Kawano v Ryusuke Horiuchi | 6-2,6-3 |
| UTR Pro Urayasu | 2024/10/14 01:30 | Vassili Psaltopoulos v Ryusuke Horiuchi | 1-6,3-6 |
| ITF M25 Takasaki | 2024/09/17 00:50 | Ryusuke Horiuchi v Seita Watanabe | 5-7,6-7 |
| ITF M25 Takasaki | 2024/09/16 03:20 | Naoki Tajima v Ryusuke Horiuchi | 2-6,5-7 |
| ITF M25 Takasaki | 2024/09/15 01:00 | Ryusuke Horiuchi v Ko Suzuki | 7-6,6-4 |