Stadium: Court H Round: 25 Ground: Hardcourt outdoor
| Challenger Kyoto | 2018/02/20 05:35 | Yuya Kibi v Hubert Hurkacz | 5-7,3-6 |
| Challenger Kyoto Qual | 2018/02/19 03:30 | Luke Saville v Yuya Kibi | 3-6,3-6 |
| Challenger Kyoto Qual | 2018/02/18 04:25 | Tung-Lin Wu v Yuya Kibi | 6-2,1-6,1-6 |
| Challenger Kyoto Qual | 2018/02/17 06:10 | Yuya Kibi v Shuichi Sekiguchi | 6-3,6-2 |
| Challenger Bangkok | 2018/01/09 04:55 | Mats Moraing v Yuya Kibi | 6-2,6-2 |
| Challenger Bangkok Qual | 2018/01/08 03:00 | Daniiar Duldaev v Yuya Kibi | 2-6,2-6 |
| Challenger Bangkok Qual | 2017/12/31 03:00 | Yuya Kibi v Evgeny Karlovskiy | 1-6,3-6 |
| Challenger Bangkok Qual | 2017/12/30 03:00 | Matej Sabanov v Yuya Kibi | 2-6,6-7 |
| 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 |
| 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 |