Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF Japan F3 | 2018/03/19 02:40 | Tae-Woo Lee v Kaito Uesugi | 3-6,3-6 |
| ITF Japan F2 | 2018/03/16 01:00 | Daniel Nguyen v Kaito Uesugi | 6-2,2-6,7-6 |
| ITF Japan F2 | 2018/03/15 02:35 | Issei Okamura v Kaito Uesugi | 4-6,5-7 |
| ITF Japan F2 | 2018/03/13 02:00 | Kaito Uesugi v Takuto Niki | 6-0,6-3 |
| ITF Japan F1 | 2018/03/06 02:00 | Yuya Kibi v Kaito Uesugi | 7-6,4-6,6-3 |
| Challenger - Yokohama | 2018/02/26 04:30 | Tatsuma Ito v Kaito Uesugi | 6-2,6-3 |
| Challenger Kyoto Qual | 2018/02/18 02:45 | Takanyi Garanganga v Kaito Uesugi | 4-6,6-3,6-4 |
| Challenger Kyoto Qual | 2018/02/17 04:20 | Kaito Uesugi v Mukund Sasikumar | 6-1,6-3 |
| ITF Japan F3 | 2018/03/19 04:30 | Rio Noguchi v Shintaro Imai | 6-7,4-6 |
| ITF Japan F2 | 2018/03/17 02:00 | Shintaro Imai v Tung-Lin Wu | 5-7,0-6 |
| ITF Japan F2 | 2018/03/16 01:00 | Soichiro Moritani v Shintaro Imai | 2-6,5-7 |
| ITF Japan F2 | 2018/03/14 01:00 | Rio Noguchi v Shintaro Imai | 3-6,3-6 |
| ITF Japan F2 | 2018/03/13 02:10 | Cheng-Yu Yu v Shintaro Imai | 7-6,3-6,2-6 |
| ITF Japan F1 | 2018/03/06 02:00 | Shintaro Imai v Sho Katayama | 2-6,5-7 |
| Challenger Yokohama Qual | 2018/02/24 01:00 | Maverick Banes v Shintaro Imai | 7-6,1-6,7-6 |
| Challenger Kyoto | 2018/02/20 05:00 | Konstantin Kravchuk v Shintaro Imai | 6-4,7-5 |