Stadium: Court 4 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Hinode | 2024/03/11 01:00 | Yuta Kikuchi v Ko Suzuki | 6-1,7-5 |
| 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 M15 Hinode | 2024/03/14 00:55 | Linang Xiao v Keisuke Saitoh | 6-4,6-2 |
| ITF M15 Hinode | 2024/03/13 03:35 | Keisuke Saitoh v Sora Fukuda | 7-6,3-6,6-2 |
| ITF M15 Hinode | 2024/03/11 05:45 | Keisuke Saitoh v Yuta Kikuchi | 6-0,5-7,3-10 |
| ITF M15 Hinode | 2024/03/11 01:00 | Keisuke Saitoh v Ryoto Tachi | 6-3,6-2 |
| ITF M15 Hinode | 2024/03/10 03:00 | Keisuke Saitoh v Yusuke Kusuhara | 7-6,3-6,10-8 |
| 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 |