| ITF Korea F8 | 09/04 02:00 | 62 | Keisuke Numajiri v Gwang Hyeon Cho | 6-1,6-4 | |
| ITF Korea F8 | 08/28 02:00 | 62 | Keisuke Numajiri v Woo Hyeok Jang | 3-6,1-6 | |
| ITF Spain F26 Qual | 08/14 08:30 | 44 | Keisuke Numajiri v Aitor S Llopis | 2-6,4-6 | |
| ITF Spain F25 | 08/09 10:00 | 25 | Benjamin Bonzi v Keisuke Numajiri | 6-0,6-4 | |
| ITF Spain F24 | 08/03 20:15 | 25 | Sebastien Boltz v Keisuke Numajiri | 6-2,7-5 | |
| ITF Spain F24 | 08/01 09:00 | 62 | Keisuke Numajiri v Boris Arias | 6-4,7-6 | |
| ITF Spain F24 | 07/31 14:00 | 62 | Keisuke Numajiri v Miguel Vallejo | 6-2,6-2 | |
| ITF Macedonia F2 | 06/28 07:30 | 25 | Alexander Lazov v Keisuke Numajiri | 6-1,6-0 | |
| ITF Macedonia F2 | 06/27 07:30 | 44 | Aljaz Radinski v Keisuke Numajiri | 3-6,0-6 | |
| ITF Macedonia F2 | 06/26 07:30 | 44 | Bogdan Bajic v Keisuke Numajiri | 1-6,6-7 | |
| ITF Macedonia F1 Qual | 06/20 08:00 | 44 | Strahinja Rakic v Keisuke Numajiri | 6-3,6-2 | |
| ITF Macedonia F1 Qual | 06/19 14:00 | 44 | Patrik Nema v Keisuke Numajiri | 4-6,1-6 | |
| ITF Turkey F24 | 06/15 11:30 | 25 | Keisuke Numajiri v Mate Delic | 1-6,1-6 | |
| ITF Turkey F23 MD | 06/09 10:55 | 26 | Keisuke Numajiri v Carlos Boluda-Purkiss | 6-3,4-6,0-6 | |
| ITF Turkey F23 MD | 06/08 11:30 | 25 | Bjoern Petersen v Keisuke Numajiri | 1-6,1-6 | |
| ITF Turkey F23 MD | 06/06 07:00 | 44 | Keisuke Numajiri v Stephen Kaldawi | 6-3,6-1 | |
| ITF Turkey F23 MD | 06/05 11:30 | 44 | Keisuke Numajiri v Louroi Martinez | 6-7,7-5,6-0 | |
| ITF Turkey F19 | 05/13 07:30 | 27 | Anil Yuksel v Keisuke Numajiri | 3-6,6-1,6-2 | |
| ITF Turkey F19 | 05/12 08:00 | 26 | Alp Sentay v Keisuke Numajiri | 4-6,0-6 | |
| ITF Turkey F19 | 05/11 13:00 | 25 | Keisuke Numajiri v Antoine Escoffier | 4-6,6-3,7-6 | |
| ITF Turkey F19 Qual | 05/09 08:00 | 44 | Keisuke Numajiri v Yuichiro Inui | 6-0,6-3 | |
| ITF Turkey F19 Qual | 05/08 10:00 | 44 | Keisuke Numajiri v Polat Gulcur | 6-2,6-1 | |
| ITF Turkey F18 | 05/05 09:30 | 26 | Keisuke Numajiri v Marc Sieber | 0-6,2-6 | |
| ITF Turkey F18 | 05/03 10:00 | 25 | Soichiro Moritani v Keisuke Numajiri | 6-4,4-6,3-6 | |
| ITF Turkey F18 | 05/02 08:00 | 44 | Keisuke Numajiri v Marko Osmakcic | 7-5,7-5 | |
| ITF Turkey F17 | 04/28 10:00 | 26 | Miliaan Niesten v Keisuke Numajiri | 6-2,6-1 | |
| ITF Turkey F17 | 04/27 09:25 | 25 | Keisuke Numajiri v Sefa Suluoglu | 6-2,6-1 | |
| ITF Turkey F17 | 04/25 08:00 | 44 | Soichiro Moritani v Keisuke Numajiri | 1-6,2-6 | |
| ITF Japan F4 | 03/28 01:00 | 62 | Jumpei Yamasaki v Keisuke Numajiri | 6-4,6-4 | |
| ITF Japan F4 | 03/26 02:00 | 62 | Keisuke Numajiri v Weiqiang Zheng | 7-6,4-6,6-2 |