Stadium: KPI Park - Court 01 Ground: Hardcourt outdoor
Referee:
| ITF M15 Karuizawa | 2025/06/04 05:58 | Ryotaro Matsumura v Ko Nagashima | 6-1,6-2 |
| UTR Pro Urayasu | 2025/05/24 02:15 | Mattias Southcombe v Ko Nagashima | 6-1,7-6 |
| UTR Pro Urayasu | 2025/05/23 01:40 | Taichi Wakamatsu v Ko Nagashima | 6-1,7-5 |
| UTR Pro Urayasu | 2025/05/22 01:00 | Taiyo Kurata v Ko Nagashima | 6-2,2-6,6-1 |
| UTR Pro Urayasu | 2025/05/21 02:45 | Derek Pham v Ko Nagashima | 6-1,6-4 |
| UTR Pro Urayasu | 2025/05/19 06:05 | Stefan Harangozo v Ko Nagashima | 6-3,4-6,5-7 |
| UTR Pro Kawaguchi | 2025/05/04 01:00 | Masaya Kobayashi v Ko Nagashima | 6-4,1-6,3-6 |
| UTR Pro Kawaguchi | 2025/05/03 00:00 | Yusuke Yoshikawa v Ko Nagashima | 4-6,7-6,3-6 |
| ITF M15 Antalya | 2024/12/22 07:00 | Mark Kaufman v Mikhail Malakhovich | 1-6,4-6 |
| ITF M15 Sharm El Sheikh | 2024/09/15 09:30 | Mark Kaufman v Jonas Keck | 3-6,4-6 |
| ITF M15 Monastir | 2024/04/22 09:30 | Alexey Nesterov v Mark Kaufman | 6-1,6-3 |
| ITF M15 Monastir | 2024/04/21 08:00 | Benjamin Palm v Mark Kaufman | 6-7,3-6 |
| ITF M15 Monastir | 2024/04/07 08:30 | Ivo Vercik v Mark Kaufman | 6-2,7-5 |
| ITF M25 Antalya | 2024/02/11 07:00 | Mark Kaufman v Umut Kaan Yenilmez | 1-6,4-6 |
| ITF M25 Antalya | 2024/01/28 07:00 | Mark Kaufman v Melih Anavatan | 4-6,3-6 |