Stadion: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF - Japan F4 | 2017/04/01 01:00 | Takuto Niki v Kaito Uesugi | 6-3,6-3 |
| 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 - Qualifikation | 2018/02/18 02:45 | Takanyi Garanganga v Kaito Uesugi | 4-6,6-3,6-4 |
| Challenger - Kyoto - Qualifikation | 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 - Qualifikation | 2017/11/12 07:00 | Kaito Uesugi v Xin Gao | 7-5,6-4 |
| Challenger - Toyota - Qualifikation | 2017/11/11 04:00 | Yan Bai v Kaito Uesugi | 5-7,6-7 |
| Challenger - Toyota - Qualifikation | 2017/11/11 00:30 | Hsien-Yin Peng v Kaito Uesugi | 4-6,3-6 |
| 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 | Takuto Niki v Soichiro Moritani | 6-1,6-4 |
| ITF - Japan F1 | 2018/03/08 03:10 | Takuto Niki v Yuya Kibi | 6-3,7-5 |
| ITF - Japan F1 | 2018/03/07 04:45 | Takuto Niki v Naoya Maesaki | 6-2,6-7,6-2 |
| Challenger - Yokohama - Qualifikation | 2018/02/25 02:35 | Yunseong Chung v Takuto Niki | 6-7,6-3,6-3 |
| Challenger - Yokohama - Qualifikation | 2018/02/24 07:05 | Takuto Niki v N.Sriram Balaji | 3-6,7-6,7-5 |
| Challenger - Kyoto - Qualifikation | 2018/02/19 03:45 | Blake Ellis v Takuto Niki | 6-3,6-4 |
| Challenger - Kyoto - Qualifikation | 2018/02/18 06:05 | Masaki Osafune v Takuto Niki | 3-6,2-6 |