Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Yokohama | 2017/03/03 05:00 | Kaito Uesugi v Tatsuma Ito | 7-6,2-6,6-7 |
| Challenger Kyoto | 2018/02/21 08:10 | Blake Ellis v Tatsuma Ito | 4-6,6-3,6-4 |
| Challenger Kyoto | 2018/02/19 07:10 | Yuta Shimizu v Tatsuma Ito | 2-6,3-6 |
| Challenger Dallas | 2018/01/29 18:45 | Mackenzie McDonald v Tatsuma Ito | 7-5,6-3 |
| Australian Open Qual | 2018/01/10 08:50 | Tatsuma Ito v Casper Ruud | 6-4,1-6,4-6 |
| Challenger Bangkok | 2018/01/01 08:00 | Tatsuma Ito v Blaz Rola | 6-7,6-7 |
| Challenger Hua Hin | 2017/11/25 09:35 | Tatsuma Ito v John Millman | 6-7,2-6 |
| Challenger Hua Hin | 2017/11/24 09:20 | Soonwoo Kwon v Tatsuma Ito | 6-1,4-6,4-6 |
| Challenger Hua Hin | 2017/11/23 06:55 | Maverick Banes v Tatsuma Ito | 1-6,6-7 |
| 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 |
| Challenger Toyota | 2017/11/14 01:00 | Hubert Hurkacz v Kaito Uesugi | 6-3,6-0 |
| Challenger Toyota Qual | 2017/11/12 07:00 | Kaito Uesugi v Xin Gao | 7-5,6-4 |
| Challenger Toyota Qual | 2017/11/11 04:00 | Yan Bai v Kaito Uesugi | 5-7,6-7 |
| Challenger Toyota Qual | 2017/11/11 00:30 | Hsien-Yin Peng v Kaito Uesugi | 4-6,3-6 |
| Challenger Kobe | 2017/11/07 02:00 | Akira Santillan v Kaito Uesugi | 6-1,6-3 |
| ATP Tokyo Qual | 2017/09/30 03:00 | Frances Tiafoe v Kaito Uesugi | 6-2,6-4 |