Round: 26 Ground: Hardcourt outdoor
| ITF Giappone F1 | 2016/03/12 01:00 | Takuto Niki v Gengo Kikuchi | 6-7,6-4,3-6 |
| ITF Giappone F1 | 2017/03/07 02:40 | Jumpei Yamasaki v Gengo Kikuchi | 4-6,2-6 |
| 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 |
| ITF M25 Tbilisi | 2016/11/13 06:00 | Kento Takeuchi v Gengo Kikuchi | 6-3,6-2 |
| ITF M25 Tbilisi | 2016/11/12 07:45 | Gengo Kikuchi v Sho Katayama | 6-3,3-6,6-3 |
| ITF M25 Tbilisi | 2016/11/12 01:50 | Gengo Kikuchi v Yunseong Chung | 7-5,6-4 |
| ITF M25 Tbilisi | 2016/11/05 04:20 | Renta Tokuda v Gengo Kikuchi | 6-3,6-3 |
| ITF Giappone 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 |
| Challenger Kyoto - Qual. | 2017/02/19 03:20 | Alex Bolt v Takuto Niki | 6-4,6-7,6-2 |
| Challenger Kyoto - Qual. | 2017/02/18 05:25 | Yunseong Chung v Takuto Niki | 2-6,6-7 |