| ITF Japan F7 | 06/03 04:00 | 54 | Shoma Kato v Keisuke Numajiri | 6-4,6-1 | |
| ITF Turkey F19 Qual | 05/14 07:00 | 62 | Keisuke Numajiri v Alexander Pavlioutchenkov | 5-7,6-2,3-6 | |
| ITF Turkey F18 | 05/10 08:05 | 25 | Денис Новак v Keisuke Numajiri | 6-1,6-0 | |
| ITF Turkey F14 | 04/10 07:30 | 62 | Keisuke Numajiri v Filip Brtnicky | 1-6,3-6 | |
| ITF Turkey F14 | 04/09 07:00 | 62 | Keisuke Numajiri v Сами Бен Абденниби | 6-2,3-6,6-3 | |
| ITF Turkey F13 | 04/02 07:30 | 44 | Keisuke Numajiri v Мерт Начи Туркер | 7-6,2-6,3-6 | |
| ITF Turkey F12 | 03/28 09:20 | 25 | Жулен Канина v Keisuke Numajiri | 6-1,6-1 | |
| ITF Turkey F12 | 03/27 07:00 | 44 | Сарп Агабигун v Keisuke Numajiri | 2-6,3-6 | |
| ITF Turkey F12 | 03/26 07:00 | 44 | Ришабдев Раман v Keisuke Numajiri | 2-6,0-6 | |
| ITF Spain F6 | 02/18 08:00 | 62 | Луис Диего Чавез Вияпандо v Keisuke Numajiri | 6-1,5-7,6-4 | |
| ITF Egypt F4 | 02/08 12:30 | 25 | Keisuke Numajiri v Ilija Vucic | 5-7,6-7 | |
| ITF Egypt F4 | 02/06 08:00 | 62 | Хироясу Ехара v Keisuke Numajiri | 6-0,6-3 | |
| ITF Egypt F4 | 02/05 08:00 | 62 | Dominik Nazaruk v Keisuke Numajiri | 1-6,1-6 | |
| ITF Egypt F4 | 02/04 07:00 | 62 | Педро Габриел Родригес v Keisuke Numajiri | 1-6,2-6 | |
| ITF Egypt F3 | 02/01 08:00 | 25 | Keisuke Numajiri v Вит Коприва | 2-6,4-6 | |
| ITF Egypt F3 | 01/30 08:00 | 62 | Keisuke Numajiri v Лакшит Соод | 7-5,6-2 | |
| ITF Egypt F3 | 01/29 08:00 | 62 | Joy Vigani v Keisuke Numajiri | 5-7,1-6 | |
| ITF Egypt F3 | 01/28 08:00 | 62 | Томас Лиска v Keisuke Numajiri | 2-6,1-6 | |
| ITF Thailand F6 | 12/25 03:00 | 44 | Keisuke Numajiri v Danila Arsenov | Retired | |
| ITF Thailand F6 | 12/24 07:00 | 44 | Keisuke Numajiri v Andrey Yakovlev | 6-1,6-0 | |
| ITF Thailand F5 | 12/20 05:20 | 25 | Sang-Woo Noh v Keisuke Numajiri | 7-6,6-2 | |
| ITF Thailand F5 | 12/18 04:00 | 44 | Soichiro Moritani v Keisuke Numajiri | 4-6,4-6 | |
| ITF Thailand F5 | 12/17 06:00 | 44 | Sharobiddin Abzalov v Keisuke Numajiri | 6-3,3-6,3-6 | |
| ITF Thailand F4 | 12/13 03:00 | 25 | Yong-Kyu Lim v Keisuke Numajiri | 6-4,6-1 | |
| ITF Thailand F4 | 12/11 05:30 | 44 | Keisuke Numajiri v Danila Arsenov | 6-4,2-6,6-2 | |
| ITF Thailand F4 | 12/10 07:00 | 44 | Keisuke Numajiri v Sung Jun Park | 7-6,2-6,6-0 | |
| ITF Chinese Taipei F1 | 10/11 05:00 | 25 | Cheng-Yu Yu v Keisuke Numajiri | 6-2,6-4 | |
| Challenger Nanchang Qual | 09/10 07:10 | 46 | Шуичи Секигучи v Keisuke Numajiri | 6-0,6-2 | |
| ITF Korea F8 | 09/07 04:35 | 26 | Keisuke Numajiri v Жеа Мун Ли | 1-6,1-6 | |
| ITF Korea F8 | 09/06 04:00 | 25 | Katsuki Nagao v Keisuke Numajiri | 6-3,4-6,0-6 |