Round: 25 Ground: Hardcourt outdoor
| ITF Japan F7 | 2017/06/03 04:00 | Shoma Kato v Keisuke Numajiri | 6-4,6-1 |
| ITF Turkey F19 Qual | 2017/05/14 07:00 | Keisuke Numajiri v Alexander Pavlioutchenkov | 5-7,6-2,3-6 |
| ITF Turkey F18 | 2017/05/10 08:05 | Dennis Novak v Keisuke Numajiri | 6-1,6-0 |
| ITF Turkey F14 | 2017/04/10 07:30 | Keisuke Numajiri v Filip Brtnicky | 1-6,3-6 |
| ITF Turkey F14 | 2017/04/09 07:00 | Keisuke Numajiri v Sami Ben Abdennibi | 6-2,3-6,6-3 |
| ITF Turkey F13 | 2017/04/02 07:30 | Keisuke Numajiri v Mert Naci Turker | 7-6,2-6,3-6 |
| ITF Turkey F12 | 2017/03/28 09:20 | Julien Cagnina v Keisuke Numajiri | 6-1,6-1 |
| ITF Turkey F12 | 2017/03/27 07:00 | Sarp Agabigun v Keisuke Numajiri | 2-6,3-6 |