Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| 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 |
| Challenger Yokohama | 2018/02/27 05:35 | Daniel Nguyen v Yosuke Watanuki | 6-2,6-4 |
| ITF Japan F2 | 2018/03/12 02:30 | Yuya Kibi v Ryota Tanuma | 6-2,2-6,7-5 |
| ITF Japan F1 | 2018/03/08 03:10 | Takuto Niki v Yuya Kibi | 6-3,7-5 |
| ITF Japan F1 | 2018/03/06 02:00 | Yuya Kibi v Kaito Uesugi | 7-6,4-6,6-3 |
| 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 |