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