Round: 25 Ground: Hardcourt outdoor
| Challenger Kyoto Qual | 2017/02/19 01:00 | Sekiguchi, Shuichi v Tanaka, Yunosuke | 6-0,6-4 |
| Challenger Kyoto Qual | 2017/02/18 02:35 | Fujii, Sota v Tanaka, Yunosuke | 6-3,3-6,6-7 |
| ITF Japan F1 | 2017/03/12 02:00 | Yusuke Takahashi v Niki, Takuto | 7-5,6-3 |
| ITF Japan F1 | 2017/03/11 01:00 | Ehara, Hiroyasu v Niki, Takuto | 2-6,1-6 |
| ITF Japan F1 | 2017/03/10 01:00 | Itsusaki, Kaito v Niki, Takuto | 2-6,4-6 |
| ITF Japan F1 | 2017/03/09 01:00 | Kikuchi, Gengo v Niki, Takuto | 0-6,4-6 |
| ITF Japan F1 | 2017/03/08 02:30 | Fujii, Shinta v Niki, Takuto | 6-7,2-6 |
| Challenger Yokohama | 2017/03/01 01:00 | Whittington, Andrew v Niki, Takuto | 6-4,7-6 |
| Challenger Yokohama | 2017/02/28 02:20 | Niki, Takuto v Shiga, Masato | 6-1,6-1 |
| Yokohama, Japan, Qualifying | 2017/02/27 01:00 | Alex Bolt v Niki, Takuto | 2-6,4-6 |