Round: 28 Ground: Hardcourt outdoor
| Challenger Yokohama Qual | 2017/02/26 03:20 | Hiroyasu Ehara v Takuto Niki | 7-6,1-6,3-6 |
| ITF Japan F3 | 2015/03/26 03:45 | Hiroyasu Ehara v Takuto Niki | 6-4,3-6,3-6 |
| ITF Japan F2 | 2015/03/21 03:20 | Takuto Niki v Hiroyasu Ehara | 6-3,6-7,6-2 |
| ITF Japan F1 | 2017/03/10 01:00 | Sang-Woo Noh v Hiroyasu Ehara | 6-1,3-6,2-6 |
| ITF Japan F1 | 2017/03/09 03:30 | Hiroyasu Ehara v Yuta Shimizu | 7-6,6-4 |
| ITF Japan F1 | 2017/03/08 01:00 | Shoma Kato v Hiroyasu Ehara | 3-6,2-6 |
| ITF Japan F1 | 2017/03/04 01:00 | Hiroyasu Ehara v Kousuke Ogura | 6-2,6-2 |
| Challenger Yokohama Qual | 2017/02/26 03:20 | Hiroyasu Ehara v Takuto Niki | 7-6,1-6,3-6 |
| Challenger Yokohama Qual | 2017/02/25 06:25 | Hiroyasu Ehara v Masamichi Imamura | 6-3,6-4 |
| ITF Egypt F4 | 2017/02/10 12:30 | Youssef Hossam v Hiroyasu Ehara | 6-4,6-2 |
| ITF Egypt F4 | 2017/02/09 09:30 | Olexiy Kolisnyk v Hiroyasu Ehara | 2-6,1-6 |
| ITF Japan F1 | 2017/03/10 01:00 | Kaito Itsusaki v Takuto Niki | 2-6,4-6 |
| ITF Japan F1 | 2017/03/09 01:00 | Gengo Kikuchi v Takuto Niki | 0-6,4-6 |
| ITF Japan F1 | 2017/03/08 02:30 | Shinta Fujii v Takuto Niki | 6-7,2-6 |
| Challenger Yokohama | 2017/03/01 01:00 | Andrew Whittington v Takuto Niki | 6-4,7-6 |
| Challenger Yokohama | 2017/02/28 02:20 | Takuto Niki v Masato Shiga | 6-1,6-1 |
| Challenger Yokohama Qual | 2017/02/27 01:00 | Alex Bolt v Takuto Niki | 2-6,4-6 |
| Challenger Yokohama Qual | 2017/02/26 03:20 | Hiroyasu Ehara v Takuto Niki | 7-6,1-6,3-6 |
| Challenger Yokohama Qual | 2017/02/25 06:00 | Takuto Niki v Axel Michon | 6-2,2-6,7-5 |