| ITF Japan F3 | 03/22 02:25 | 25 | Keisuke Numajiri v Soonwoo Kwon | 5-7,3-6 | |
| ITF Japan F3 | 03/20 02:30 | 44 | Keisuke Numajiri v Ken Onoda | 7-5,6-1 | |
| ITF Japan F2 | 03/12 00:30 | 54 | Keisuke Numajiri v Keisuke Watanuki | 6-2,2-6,1-6 | |
| ITF Japan F1 | 03/05 03:00 | 62 | Keisuke Numajiri v Kaito Uesugi | 2-6,6-3,3-6 | |
| ITF Turkey F5 | 02/01 09:30 | 62 | Keisuke Numajiri v Ryota Kishi | 2-6,2-6 | |
| ITF Turkey F5 | 01/30 08:00 | 62 | Keisuke Numajiri v Peter Balla | 4-6,6-3,6-4 | |
| ITF Turkey F4 | 01/23 08:00 | 62 | Domagoj Biljesko v Keisuke Numajiri | 6-0,6-1 | |
| ITF Turkey F3 | 01/18 09:00 | 44 | Vadym Ursu v Keisuke Numajiri | 6-7,6-3,6-4 | |
| ITF Turkey F3 | 01/17 08:30 | 44 | Philip Wilbert Major v Keisuke Numajiri | 3-6,3-6 | |
| ITF Qatar F5 | 12/09 13:30 | 26 | Joris De Loore v Keisuke Numajiri | 6-1,6-3 | |
| ITF Qatar F5 | 12/08 12:35 | 25 | Keisuke Numajiri v Ameur Ben Hassen | 6-2,6-2 | |
| ITF Qatar F5 Qual | 12/06 13:40 | 54 | Keisuke Numajiri v Omar Alawadhi | 6-3,6-4 | |
| ITF Qatar F5 Qual | 12/05 17:35 | 54 | Keisuke Numajiri v Abdulhameed Alshatti | 6-1,6-1 | |
| ITF Qatar F4 | 12/01 11:10 | 25 | Scott Clayton v Keisuke Numajiri | 6-4,6-2 | |
| ITF Qatar F4 Qual | 11/29 13:00 | 54 | Keisuke Numajiri v Saida'lo Saidkarimov | 6-3,6-4 | |
| ITF Kuwait F3 Qual | 11/22 07:00 | 54 | Keisuke Numajiri v Arpit Sharma | 6-0,6-1 | |
| ITF Kuwait F2 | 11/15 07:00 | 54 | Keisuke Numajiri v James Allemby | 6-3,6-4 | |
| ITF Kuwait F2 | 11/14 07:00 | 54 | Keisuke Numajiri v Yusuf Khamis | 7-6,6-2 | |
| ITF Turkey F36 | 09/06 13:00 | 62 | Keisuke Numajiri v Alexander Babanine | 4-6,3-6 | |
| ITF Turkey F35 | 09/03 13:00 | 26 | Keisuke Numajiri v Michal Konecny | 1-6,5-7 | |
| ITF Serbia F6 | 07/20 08:00 | - | Timur Kiyamov v Keisuke Numajiri | 6-1,7-5 | |
| ITF Serbia F6 | 07/18 11:00 | - | David Barclay v Keisuke Numajiri | 2-6,2-6 | |
| ITF Serbia F6 | 07/11 11:00 | - | Keisuke Numajiri v Goran Markovic | 6-4,6-4 | |
| ITF Japan F8 | 06/25 01:00 | - | Keisuke Numajiri v Keisuke Watanuki | 3-6,3-6 | |
| ITF Japan F7 | 06/18 02:10 | - | Keisuke Numajiri v Ju-Hae Moon | Walkover | |
| ITF Japan F7 Qual | 06/15 00:30 | - | Renta Tokuda v Keisuke Numajiri | 3-6,1-6 | |
| ITF Japan F7 Qual | 06/13 00:00 | - | Naoto Kai v Keisuke Numajiri | 2-6,3-6 | |
| ITF Japan F6 Qual | 06/07 05:00 | - | Koichi Sano v Keisuke Numajiri | 6-0,4-6,6-1 | |
| ITF USA F16 | 05/09 16:00 | - | Justin Lunn v Keisuke Numajiri | 3-6,2-6 | |
| ITF USA F16 | 05/08 20:00 | - | Brandon Donaldson v Keisuke Numajiri | 1-6,2-6 |