Round: 44 Ground: Hardcourt outdoor
| ITF Chinese Taipei F1 | 2016/10/11 05:00 | Cheng-Yu Yu v Keisuke Numajiri | 6-2,6-4 |
| Challenger Nanchang Qual | 2016/09/10 07:10 | Shuichi Sekiguchi v Keisuke Numajiri | 6-0,6-2 |
| ITF Korea F8 | 2016/09/07 04:35 | Keisuke Numajiri v Jeamoon Lee | 1-6,1-6 |
| ITF Korea F8 | 2016/09/06 04:00 | Katsuki Nagao v Keisuke Numajiri | 6-3,4-6,0-6 |
| ITF Korea F8 | 2016/09/04 02:00 | Keisuke Numajiri v Gwang Hyeon Cho | 6-1,6-4 |
| ITF Korea F8 | 2016/08/28 02:00 | Keisuke Numajiri v Woo Hyeok Jang | 3-6,1-6 |
| ITF Spain F26 Qual | 2016/08/14 08:30 | Keisuke Numajiri v Aitor S Llopis | 2-6,4-6 |
| ITF Spain F25 | 2016/08/09 10:00 | Benjamin Bonzi v Keisuke Numajiri | 6-0,6-4 |
| ITF Thailand F4 | 2016/12/10 02:30 | Tonkla Mulada v Sung Jun Park | 3-6,1-6 |
| ITF Korea F8 | 2016/09/03 02:00 | Woo-Ram Kim v Sung Jun Park | 6-4,4-6,6-1 |
| ITF Korea F8 | 2016/08/29 01:30 | Oh-Hee Kwon v Sung Jun Park | 6-2,7-5 |
| ITF Korea F8 | 2016/08/28 03:00 | Chuanqi Su v Sung Jun Park | 0-6,0-6 |
| ITF Korea F8 | 2016/08/20 03:30 | Sung Jun Park v Seong Woon Yu | 6-4,2-6,3-6 |