Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Yanagawa | 2023/12/20 07:15 | Linang Xiao v Keisuke Saitoh | 6-0,6-2 |
| ITF M25 Gold Coast | 2023/11/29 01:30 | Keisuke Saitoh v Blake Mott | 2-6,2-6 |
| ITF M25 Brisbane | 2023/11/22 23:50 | Moerani Bouzige v Keisuke Saitoh | 6-4,2-6,7-5 |
| ITF M25 Brisbane | 2023/11/21 05:25 | Keisuke Saitoh v Thomas Fancutt | 4-6,7-5,6-4 |
| ITF M25 Takasaki | 2023/09/20 01:00 | Leo Vithoontien v Keisuke Saitoh | 6-4,6-3 |
| ITF M25 Sapporo | 2023/09/12 03:45 | Keisuke Saitoh v Tomohiro Masabayashi | 5-7,3-6 |
| ITF M25 Sapporo | 2023/09/06 01:00 | Keisuke Saitoh v Tomohiro Masabayashi | 4-6,6-3,1-6 |
| ITF M25 Hong Kong | 2023/08/31 02:00 | Naoki Nakagawa v Keisuke Saitoh | 6-4,6-7,6-1 |
| ITF M15 Yanagawa | 2023/12/18 03:00 | Taki Adachi v Ko Suzuki | 0-6,2-6 |
| ITF M15 Kuala Lumpur | 2023/11/27 04:00 | Tegar A S Wibowo v Taki Adachi | 3-6,6-1,10-6 |
| ITF M15 Ipoh Perak | 2023/11/19 02:00 | Taki Adachi v Hong-Lin Fu | 3-6,1-6 |
| ITF M15 Kuching | 2023/11/13 02:00 | Qian Sun v Taki Adachi | 6-1,6-3 |
| ITF M25 Takasaki | 2023/09/17 01:00 | Natsuki Yamamoto v Taki Adachi | 6-3,6-3 |
| ITF M25 Sapporo | 2023/09/13 04:00 | Kazuki Nishiwaki v Taki Adachi | 6-1,6-2 |
| ITF M25 Sapporo | 2023/09/06 03:40 | Taki Adachi v Shunsuke Wakita | 5-7,0-6 |
| ITF M25 Changwon | 2023/06/12 01:00 | Hyun Woo Cho v Taki Adachi | 6-2,6-4 |