Round: 25 Ground: Hardcourt outdoor
| ITF Japan F1 | 2016/03/12 05:30 | Kikuchi, Gengo v Sekiguchi, Shuichi | 7-6,6-1 |
| ITF Japan F1 | 2016/03/12 01:00 | Sekiguchi, Shuichi v Kibi, Yuya | 6-4,6-3 |
| ITF Japan F1 | 2016/03/10 04:25 | Sekiguchi, Shuichi v Katayama, Sho | 7-5,7-6 |
| ITF Japan F1 | 2016/03/10 01:00 | Sekiguchi, Shuichi v Sasai, Masaki | 6-3,6-0 |
| Challenger Launceston | 2016/02/02 04:20 | Alex Bolt v Sekiguchi, Shuichi | 6-3,6-4 |
| Challenger Shanghai | 2015/10/10 05:40 | Nikoloz Basilashvili v Sekiguchi, Shuichi | 6-4,6-2 |
| WTA Kuala Lumpur Qual | 2015/09/26 02:00 | Begemann, Andre v Sekiguchi, Shuichi | 2-6,6-2,6-3 |
| Challenger Kaohsiung Qual | 2015/09/20 06:50 | Sekiguchi, Shuichi v Yi, Chu-Huan | 4-6,4-6 |
| ITF Japan F4 | 2015/03/30 01:00 | Sakai, Yuto v Hong, Seong Chan | 1-6,0-6 |
| ITF Japan F4 | 2015/03/29 00:00 | Ratiwatana, Sanchai v Sakai, Yuto | 6-4,3-6,1-6 |