Round: 25 Ground: Hardcourt outdoor
| ITF Thailand F9 | 2015/11/23 03:00 | Pruchya Isarow v Issei Okamura | 6-2,6-4 |
| ITF Australia F10 | 2015/11/18 23:00 | Dayne Kelly v Issei Okamura | 6-4,6-0 |
| ITF Australia F10 | 2015/11/16 23:00 | Issei Okamura v Adam Taylor | 7-5,3-6,7-6 |
| ITF Australia F10 | 2015/11/11 04:20 | Issei Okamura v Harry Bourchier | 2-6,7-6,3-6 |
| ITF Chinese Taipei F1 | 2015/08/27 02:00 | Issei Okamura v Yan Bai | 2-6,1-6 |
| ITF Chinese Taipei F1 | 2015/08/25 02:00 | Issei Okamura v Shao-Fan Liu | 6-3,6-4 |
| ITF Chinese Taipei F1 | 2015/08/22 02:00 | Tsung-Hua Yang v Issei Okamura | 6-0,6-1 |
| ITF Chinese Taipei F1 | 2015/08/21 02:00 | Issei Okamura v Ryota Tanuma | 6-4,3-6,6-3 |
| ITF Thailand F9 | 2015/11/25 06:30 | Warit Sornbutnark v Duckhee Lee | 4-6,6-7 |
| ITF Thailand F9 | 2015/11/24 04:35 | Kittiphong Wachiramanowong v Warit Sornbutnark | 6-7,6-1,4-6 |
| Davis Cup | 2015/09/20 04:15 | Warit Sornbutnark v Zhe Li | 1-6,0-6 |
| Davis Cup | 2015/09/18 03:00 | Warit Sornbutnark v Ze Zhang | 1-6,0-6,0-6 |
| ITF Thailand F9 | 2015/06/24 05:00 | Shuichi Sekiguchi v Warit Sornbutnark | 6-4,6-3 |
| ITF Thailand F9 | 2015/06/23 05:40 | Warit Sornbutnark v Chayanon Kaewsuto | 7-6,6-3 |
| ITF Thailand F9 | 2015/06/17 03:30 | Jung-Woong Na v Warit Sornbutnark | 6-2,6-3 |
| ITF Thailand F9 | 2015/06/16 05:40 | Warit Sornbutnark v Ahmed Deedat Abdul Razak | 4-6,6-3,6-2 |