Round: 25 Ground: Hardcourt outdoor
| ITF - Japan F4 | 2015/04/01 01:00 | Jumpei Yamasaki v Yusuke Watanuki | 6-7,3-6 |
| ITF - Japan F3 | 2017/03/22 07:30 | Xin Gao v Yusuke Watanuki | 2-6,6-3,6-2 |
| ITF - Japan F3 | 2017/03/22 03:35 | Collin Johns v Yusuke Watanuki | 3-6,1-6 |
| Challenger - Yokohama - Qualifikation | 2017/02/25 04:25 | Yusuke Watanuki v Evgeny Karlovskiy | 3-6,6-7 |
| Challenger - Kyoto - Qualifikation | 2017/02/19 02:10 | Yusuke Watanuki v Prajnesh Gunneswaran | 2-6,4-6 |
| Challenger - Kyoto - Qualifikation | 2017/02/18 01:00 | Yusuke Watanuki v Renta Tokuda | 6-4,4-6,6-1 |
| Challenger - Launceston - Qualifikation | 2017/02/05 02:10 | Bradley Mousley v Yusuke Watanuki | 6-3,6-2 |
| Challenger - Launceston - Qualifikation | 2017/02/04 03:15 | Oliver Casey v Yusuke Watanuki | 5-7,4-6 |
| Challenger - Burnie - Qualifikation | 2017/01/28 01:45 | Luca Margaroli v Yusuke Watanuki | 7-6,6-2 |
| ITF - Japan F3 | 2017/03/22 04:45 | Jumpei Yamasaki v Jeamoon Lee | 6-7,3-6 |
| ITF - Japan F3 | 2017/03/20 01:00 | Renta Tokuda v Jumpei Yamasaki | 3-6,6-1,3-6 |
| ITF - Japan F2 | 2017/03/14 02:30 | Jumpei Yamasaki v Jeamoon Lee | 1-6,3-6 |
| ITF - Japan F1 | 2017/03/07 02:40 | Jumpei Yamasaki v Gengo Kikuchi | 4-6,2-6 |
| Challenger - Yokohama - Qualifikation | 2017/02/27 01:00 | Blake Mott v Jumpei Yamasaki | 6-0,6-1 |
| Challenger - Yokohama - Qualifikation | 2017/02/26 02:20 | Kaito Itsusaki v Jumpei Yamasaki | 3-6,3-6 |
| Challenger - Yokohama - Qualifikation | 2017/02/25 03:15 | Jumpei Yamasaki v Roberto Quiroz | 6-3,3-6,7-5 |
| Challenger - Kyoto | 2017/02/21 07:50 | Soonwoo Kwon v Jumpei Yamasaki | 6-1,6-1 |