Stadium: Court 11 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Hong Kong | 2023/08/30 03:50 | Naoki Nakagawa v Hong Kit Wong | 7-6,6-3 |
| ITF M25 Decatur | 2023/08/06 17:00 | Naoki Nakagawa v Cash Hanzlik | 6-4,1-6,4-6 |
| ITF M25 Decatur | 2023/08/05 15:25 | Naoki Nakagawa v Jonah Braswell | 6-2,4-6,6-1 |
| ITF M25 Decatur | 2023/08/04 14:00 | Naoki Nakagawa v Kareem Allaf | 7-6,6-3 |
| ITF M25 Decatur | 2023/08/03 15:50 | Naoki Nakagawa v Quinn Vandecasteele | 6-4,6-1 |
| ITF M25 Decatur | 2023/08/02 14:00 | Naoki Nakagawa v Vito Tonejc | 6-3,7-6 |
| ITF M25 Edwardsville | 2023/07/28 14:30 | Quinn Vandecasteele v Naoki Nakagawa | 6-4,6-1 |
| ITF M25 Edwardsville | 2023/07/28 00:00 | Micah Braswell v Naoki Nakagawa | 4-6,4-6 |
| ITF M25 Hong Kong | 2023/08/30 02:00 | Keisuke Saitoh v Ji Hoon Son | 6-3,7-6 |
| ITF M15 Caloundra | 2023/08/04 00:55 | Isaac Becroft v Keisuke Saitoh | 6-3,6-4 |
| ITF M15 Caloundra | 2023/08/03 00:50 | Tai Leonard Sach v Keisuke Saitoh | 2-6,1-6 |
| ITF M15 Caloundra | 2023/08/01 04:50 | Keisuke Saitoh v Edward Winter | 7-6,6-2 |
| ITF M15 Caloundra | 2023/07/27 00:00 | Isaac Becroft v Keisuke Saitoh | 5-7,6-2,6-1 |
| ITF M15 Caloundra | 2023/07/25 03:30 | Matthew Burton v Keisuke Saitoh | 3-6,2-6 |
| ITF M25 Anseong | 2023/06/20 02:00 | Keisuke Saitoh v Yeongseok Jeong | 6-7,4-6 |
| ITF M25 Changwon | 2023/06/14 06:00 | Keisuke Saitoh v Dominik Palan | 5-7,6-7 |