Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| 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 |
| ITF M25 Sapporo | 2024/09/08 05:00 | Ko Suzuki v Ryusuke Horiuchi | 6-3,6-4 |
| ITF M25 Sapporo | 2024/09/01 01:00 | Jeffrey Fradkin v Ryusuke Horiuchi | 6-4,2-6,10-6 |
| ITF M15 Tokyo | 2024/07/08 03:30 | Woobin Shin v Ryusuke Horiuchi | 6-3,6-2 |
| ITF M15 Tokyo | 2024/07/01 01:00 | Ryusuke Horiuchi v Yuta Tomida | 3-6,4-6 |
| ITF M15 Hinode | 2024/03/10 03:00 | Ryusuke Horiuchi v Mattias Southcombe | 3-6,6-3,5-10 |
| ITF M15 Antalya | 2024/02/27 06:30 | Federico Campana v Ryusuke Horiuchi | 6-3,4-6,10-6 |
| ITF M25 Takasaki | 2024/09/16 00:55 | Seita Watanabe v Yuta Tomida | 6-7,6-3,10-7 |
| ITF M25 Takasaki | 2024/09/15 01:00 | Seita Watanabe v Shunrou Takeshima | 6-3,1-6,10-5 |
| Challenger Guangzhou | 2024/09/08 02:00 | Pengyu Lu v Seita Watanabe | 7-5,6-3 |
| Challenger Zhangjiagang | 2024/08/25 03:00 | Kris Van Wyk v Seita Watanabe | 6-3,6-3 |
| Challenger Jinan | 2024/08/18 10:35 | Keegan Smith v Seita Watanabe | 6-4,6-2 |
| Challenger Astana | 2024/07/17 06:40 | Aleksandre Bakshi v Seita Watanabe | 6-3,6-1 |
| Challenger Astana | 2024/07/16 07:15 | Filip Peliwo v Seita Watanabe | 7-6,4-6,6-7 |
| Challenger Astana | 2024/07/15 07:20 | Seita Watanabe v Aleksandr Lobanov | 6-3,6-1 |