Round: 25 Ground: Hardcourt outdoor
| Challenger Yokohama Qual | 2017/02/27 01:00 | Blake Mott v Jumpei Yamasaki | 6-0,6-1 |
| Challenger Yokohama Qual | 2017/02/26 02:20 | Kaito Itsusaki v Jumpei Yamasaki | 3-6,3-6 |
| Challenger Yokohama Qual | 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 |
| ITF Spain F4 | 2017/02/07 08:30 | Jumpei Yamasaki v Alberto Romero De Avila Senise | 6-3,3-6,3-6 |
| ITF Spain F3 | 2017/01/31 09:00 | David Jorda Sanchis v Jumpei Yamasaki | 3-6,7-6,6-1 |
| ITF Hong Kong F1 | 2017/01/05 02:00 | Geoffrey Blancaneaux v Jumpei Yamasaki | 6-4,6-4 |
| ITF Hong Kong F1 | 2017/01/04 02:00 | Tung-Lin Wu v Jumpei Yamasaki | 3-6,4-6 |
| Challenger Yokohama Qual | 2017/02/25 01:00 | Jimmy Wang v Gengo Kikuchi | 6-3,3-6,6-1 |
| Challenger Kyoto Qual | 2017/02/19 02:05 | Lloyd Harris v Gengo Kikuchi | 6-3,6-4 |
| Challenger Kyoto Qual | 2017/02/18 01:00 | Gengo Kikuchi v Tamaki Yamao | 7-6,6-4 |
| Republica Ceha - Extraliga | 2016/11/13 06:00 | Kento Takeuchi v Gengo Kikuchi | 6-3,6-2 |
| Republica Ceha - Extraliga | 2016/11/12 07:45 | Gengo Kikuchi v Sho Katayama | 6-3,3-6,6-3 |
| Republica Ceha - Extraliga | 2016/11/12 01:50 | Gengo Kikuchi v Yunseong Chung | 7-5,6-4 |
| Republica Ceha - Extraliga | 2016/11/05 04:20 | Renta Tokuda v Gengo Kikuchi | 6-3,6-3 |
| ITF Korea F7 | 2016/08/29 02:30 | Arata Onozawa v Gengo Kikuchi | 3-6,6-2,6-3 |