Stadium: Court 2 Round: 27 Ground: Hardcourt outdoor
| ITF Japan F2 | 2018/03/15 02:40 | Daniel Nguyen v Yuya Kibi | 6-2,1-6,6-1 |
| ITF Japan F2 | 2018/03/13 03:15 | Daniel Nguyen v Jumpei Yamasaki | 6-1,2-6,6-1 |
| ITF Japan F1 | 2018/03/11 02:00 | Wishaya Trongcharoenchaikul v Daniel Nguyen | 7-5,6-7,4-6 |
| ITF Japan F1 | 2018/03/10 02:00 | Daniel Nguyen v Takuto Niki | 6-3,6-4 |
| ITF Japan F1 | 2018/03/09 02:00 | Naoki Nakagawa v Daniel Nguyen | 6-3,3-6,5-7 |
| ITF Japan F1 | 2018/03/08 05:40 | Rio Noguchi v Daniel Nguyen | 4-6,3-6 |
| ITF Japan F1 | 2018/03/07 05:30 | Shoma Kato v Daniel Nguyen | 0-6,2-6 |
| Challenger Yokohama | 2018/03/01 02:00 | Daniel Nguyen v Stephane Robert | 5-7,0-6 |
| 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 |
| 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 |