| Challenger Matsuyama | 11/08 02:20 | 25 | Shuichi Sekiguchi v Koki Matsuda | Retired | |
| Challenger Matsuyama | 11/07 03:20 | 19 |
Yuta Shimizu
v
Koki Matsuda |
0-6,3-6 | |
| Challenger Matsuyama | 11/06 02:40 | 14 | Koki Matsuda v Arjun Kadhe | 7-6,6-2 | |
| ITF M25 Kashiwa | 09/30 01:00 | 27 | Ryota Tanuma v Koki Matsuda | 7-6,6-3 | |
| ITF M25 Kashiwa | 09/29 02:55 | 26 | Koki Matsuda v Shintaro Imai | Retired | |
| ITF M25 Kashiwa | 09/27 00:55 | 25 | Koki Matsuda v Kaito Uesugi | 3-6,6-4,6-0 |