Stadium: Court 5 Round: 14 Ground: Hardcourt outdoor
| Challenger Yokohama | 2024/11/19 01:00 | Ji Sung Nam v Shintaro Mochizuki | 2-6,2-6 |
| Challenger Yokohama | 2024/11/18 02:30 | Ji Sung Nam v Naoki Nakagawa | 6-3,6-3 |
| Challenger Yokohama | 2024/11/17 05:10 | Philip Henning v Ji Sung Nam | 6-7,6-3,5-7 |
| Challenger Taipei | 2024/10/20 07:05 | Ji Sung Nam v Reese Stalder | 5-7,5-7 |
| Challenger Nonthaburi | 2024/09/25 03:00 | Ji Sung Nam v Gabriel Diallo | 6-7,0-6 |
| Challenger Nonthaburi | 2024/09/24 06:55 | Andre Ilagan v Ji Sung Nam | 4-6,4-6 |
| Challenger Nonthaburi | 2024/09/23 05:40 | Thantub Suksumrarn v Ji Sung Nam | 6-7,3-6 |
| Challenger Zhangjiagang | 2024/08/25 04:30 | Ji Sung Nam v Ajeet Rai | 4-6,0-6 |
| Challenger Yokohama | 2024/11/17 06:40 | Keisuke Saitoh v Petr Bar Biryukov | 5-7,2-6 |
| ITF M25 Takasaki | 2024/09/20 02:50 | Keisuke Saitoh v Yusuke Takahashi | 6-3,6-4 |
| ITF M25 Takasaki | 2024/09/19 05:55 | Kousuke Ogura v Keisuke Saitoh | 0-6,6-1,1-6 |
| ITF M25 Takasaki | 2024/09/17 01:00 | Naoya Honda v Keisuke Saitoh | 6-7,0-6 |
| ITF M25 Sapporo | 2024/09/12 03:40 | Keisuke Saitoh v Shintaro Imai | 2-6,6-7 |
| ITF M25 Sapporo | 2024/09/10 01:00 | Keisuke Saitoh v Daisuke Sumizawa | 6-1,6-2 |
| ITF M25 Sapporo | 2024/09/06 01:00 | Kokoro Isomura v Keisuke Saitoh | 6-2,6-4 |
| ITF M25 Sapporo | 2024/09/05 03:10 | Hiromasa Koyama v Keisuke Saitoh | 0-6,6-4,3-6 |