Stadium: Court 6 Round: 28 Ground: Hardcourt outdoor
| ITF M25 Daegu | 2023/06/06 03:10 | Duckhee Lee v Jumpei Yamasaki | 1-6,6-4,4-6 |
| ITF M15 Yanagawa | 2023/12/29 01:00 | Keisuke Saitoh v Duckhee Lee | 3-6,5-7 |
| ITF M15 Yanagawa | 2023/12/28 02:40 | Ko Suzuki v Duckhee Lee | 1-6,2-6 |
| ITF M15 Yanagawa | 2023/12/27 00:30 | Seita Watanabe v Duckhee Lee | 1-6,6-7 |
| ITF M15 Kuala Lumpur | 2023/11/29 01:30 | Duckhee Lee v Seungmin Park | 6-4,2-6,6-1 |
| ITF M15 Ipoh Perak | 2023/11/24 02:00 | Alexey Zakharov v Duckhee Lee | 6-4,6-4 |
| ITF M15 Ipoh Perak | 2023/11/23 02:30 | Andrea Bacaloni v Duckhee Lee | 3-6,3-6 |
| ITF M15 Ipoh Perak | 2023/11/21 08:35 | Darrshan Suresh Kumar v Duckhee Lee | 1-6,3-6 |
| ITF M25 Hong Kong | 2023/09/07 02:30 | Duckhee Lee v Ryuki Matsuda | 6-3,4-6,4-6 |
| ITF M15 Yanagawa | 2023/12/29 00:50 | Jumpei Yamasaki v Takuya Kumasaka | 6-1,6-4 |
| ITF M15 Yanagawa | 2023/12/28 00:55 | Jumpei Yamasaki v Yamato Sueoka | 7-5,6-1 |
| ITF M15 Yanagawa | 2023/12/26 03:25 | Kazuki Nishiwaki v Jumpei Yamasaki | 3-6,3-6 |
| ITF M15 Yanagawa | 2023/12/22 04:50 | Jumpei Yamasaki v Hikaru Shiraishi | 3-6,4-6 |
| ITF M15 Yanagawa | 2023/12/21 08:45 | Koki Matsuda v Jumpei Yamasaki | 1-6,6-1,3-6 |
| ITF M15 Yanagawa | 2023/12/21 00:30 | Shu Muto v Jumpei Yamasaki | 0-6,2-6 |
| ITF M25 Gold Coast | 2023/11/30 01:15 | Kody Pearson v Jumpei Yamasaki | 7-6,7-6 |
| ITF M25 Gold Coast | 2023/11/28 01:50 | Jumpei Yamasaki v Nam Hoang Ly | 2-6,6-4,6-3 |