Stadium: Court 4 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Yanagawa | 2023/12/28 02:40 | Ko Suzuki v Duckhee Lee | 1-6,2-6 |
| ITF M15 Yanagawa | 2023/12/27 02:10 | Kenta Miyoshi v Ko Suzuki | 6-7,3-6 |
| ITF M15 Yanagawa | 2023/12/26 00:30 | Ko Suzuki v Taketo Takamisawa | 6-1,5-7,10-8 |
| ITF M15 Yanagawa | 2023/12/21 00:30 | Sanhui Shin v Ko Suzuki | 6-1,6-4 |
| ITF M15 Yanagawa | 2023/12/20 03:00 | Shohei Chikami v Ko Suzuki | 3-6,3-6 |
| ITF M15 Yanagawa | 2023/12/18 03:00 | Taki Adachi v Ko Suzuki | 0-6,2-6 |
| ITF M25 Takasaki | 2023/09/18 01:00 | Ryotaro Taguchi v Ko Suzuki | 6-2,7-5 |
| ITF M25 Takasaki | 2023/09/17 01:00 | Mao Takada v Ko Suzuki | 3-6,4-6 |
| ITF M15 Monastir | 2024/02/22 09:00 | Adrien Gobat v Keisuke Saitoh | 6-4,7-5 |
| ITF M15 Monastir | 2024/02/20 10:50 | Keisuke Saitoh v Louis Tessa | 6-3,6-1 |
| ITF M15 Monastir | 2024/02/07 08:30 | Luca Castagnola v Keisuke Saitoh | 4-6,6-1,7-5 |
| ITF M15 Monastir | 2024/02/05 14:10 | Keisuke Saitoh v Nazim Makhlouf | 6-4,6-3 |
| ITF M15 Monastir | 2024/02/05 09:30 | Keisuke Saitoh v Dimitris Sakellaridis | 6-2,7-5 |
| ITF M15 Monastir | 2024/01/25 08:30 | Keisuke Saitoh v Andres F Canovas | 4-6,1-6 |
| ITF M15 Monastir | 2024/01/24 11:45 | Yan Bai v Keisuke Saitoh | 4-6,6-3,1-6 |
| ITF M15 Monastir | 2024/01/22 15:10 | Keisuke Saitoh v Kylian Collignon | 6-1,6-1 |