Round: 45 Ground: Hardcourt indoor
| ATP - Genebra - Qualificação | 2015/05/16 09:30 | Yann Marti v Andre Begemann | 7-6,6-4 |
| Challenger - Kaohsiung - Qualificação | 2015/09/20 06:50 | Shuichi Sekiguchi v Chu-Huan Yi | 4-6,4-6 |
| Challenger - Granby | 2015/07/23 15:00 | Shuichi Sekiguchi v Matteo Donati | 4-6,1-6 |
| ITF - Tailândia F9 | 2015/06/27 03:00 | Christopher Rungkat v Shuichi Sekiguchi | 6-4,6-3 |
| ITF - Tailândia F9 | 2015/06/26 03:00 | Shuichi Sekiguchi v Jung-Woong Na | 6-4,6-3 |
| ITF - Tailândia F9 | 2015/06/25 03:00 | Shuichi Sekiguchi v Karunuday Singh | 6-0,6-2 |
| ITF - Tailândia F9 | 2015/06/24 05:00 | Shuichi Sekiguchi v Warit Sornbutnark | 6-4,6-3 |
| ITF - Tailândia F9 | 2015/06/22 04:15 | Shuichi Sekiguchi v Woo-Ram Kim | 6-2,3-6,6-1 |
| ITF - Tailândia F9 | 2015/06/20 03:00 | Kento Takeuchi v Shuichi Sekiguchi | 1-6,2-6 |