Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF Japan F3 | 2018/03/19 02:40 | Lee, Tae-Woo v Kaito Uesugi | 3-6,3-6 |
| ITF Japan F2 | 2018/03/16 01:00 | Nguyen, Daniel 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 Niki, Takuto | 6-0,6-3 |
| ITF Japan F1 | 2018/03/06 02:00 | Kibi, Yuya 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 | Garanganga, Takanyi 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 | Moritani, Soichiro 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 | Yu, Cheng-Yu v Shintaro Imai | 7-6,3-6,2-6 |
| ITF Japan F1 | 2018/03/06 02:00 | Shintaro Imai v Katayama, Sho | 2-6,5-7 |
| Yokohama, Japan, Qualifying | 2018/02/24 01:00 | Banes, Maverick v Shintaro Imai | 7-6,1-6,7-6 |
| Kyoto, Japan | 2018/02/20 05:00 | Kravchuk, Konstantin v Shintaro Imai | 6-4,7-5 |