Ground: Hardcourt outdoor
| ITF M15 Tokyo | 2025/07/08 01:00 | Yuto Oki v Ryusuke Horiuchi | 6-3,6-4 |
| ITF M15 Luan | 2025/06/09 06:00 | Ryusuke Horiuchi v Emiliano Jorquera | 6-4,3-6,0-1 |
| ITF M15 Luan | 2025/06/04 08:00 | Xing Dao Chen v Ryusuke Horiuchi | 6-4,6-7,6-4 |
| ITF M15 Luan | 2025/04/09 03:30 | Fajing Sun v Ryusuke Horiuchi | 6-2,6-1 |
| ITF M15 Nishi-Tokyo | 2025/03/18 04:00 | Moerani Bouzige v Ryusuke Horiuchi | 6-1,6-1 |
| ITF M15 Hinode | 2025/03/13 01:00 | Ryusuke Horiuchi v Daisuke Sumizawa | 2-6,2-6 |
| UTR Pro Yokohama | 2024/12/01 02:19 | Ryusuke Horiuchi v Kai Kawano | 3-6,2-6 |
| UTR Pro Yokohama | 2024/11/30 02:00 | Ryusuke Horiuchi v Hidetoshi Owada | 6-1,6-7,6-3 |
| ITF M15 Tokyo | 2025/07/09 01:00 | Ryota Tanuma v Shunsuke Nakagawa | 7-6,6-3 |
| ITF M15 Tokyo | 2025/07/03 04:08 | Woobin Shin v Shunsuke Nakagawa | 7-6,6-3 |
| ITF M15 Tokyo | 2025/07/02 05:58 | Yuta Tomida v Shunsuke Nakagawa | 4-6,2-6 |
| ITF M15 Harmon | 2025/06/12 00:00 | Shunsuke Nakagawa v Jesse Delaney | 0-6,3-6 |
| ITF M15 Harmon | 2025/06/10 00:00 | Yuichiro Inui v Shunsuke Nakagawa | 2-6,6-7 |
| ITF M25 Changwon | 2025/06/03 05:06 | Shunsuke Nakagawa v Dong Ju Kim | 2-6,3-6 |
| ITF M15 Daegu | 2025/05/29 01:00 | Pawit Sornlaksup v Shunsuke Nakagawa | 6-4,6-7,6-4 |
| ITF M15 Daegu | 2025/05/28 02:30 | Nick Chappell v Shunsuke Nakagawa | 6-4,0-6,4-6 |