Round: 27 Ground: Hardcourt outdoor
| ITF Japan F2 | 2016/03/17 03:20 | Sekiguchi, Shuichi v Sho Shimabukuro | 6-4,6-2 |
| ITF Japan F2 | 2016/03/15 03:40 | Sekiguchi, Shuichi v Sakai, Yuto | 6-3,6-1 |
| 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 |
| ITF Japan F2 | 2016/03/17 01:00 | Kishi, Ryota v Masaya Kobayashi | 6-3,2-6,2-6 |
| ITF Japan F2 | 2016/03/15 07:15 | Masaya Kobayashi v Tearney, Finn | 6-2,7-6 |
| ITF Japan F1 | 2016/03/05 01:00 | Nagao, Katsuki v Masaya Kobayashi | 6-2,2-6,6-3 |