| ITF Japan F5 | 2015/06/03 06:30 | Takashi Saito v Masaki Sasai | 6-0,6-2 |
| ITF Guam F1 | 2015/05/26 00:00 | Hiromasa Oku v Masaki Sasai | 6-1,6-1 |
| ITF Japan F4 | 2015/03/31 03:50 | Masaki Sasai v Ryotaro Matsumura | 2-6,2-6 |
| ITF Japan F4 | 2015/03/28 03:00 | Masaki Sasai v Masayoshi Ono | 6-4,6-1 |
| ITF Japan F3 | 2015/03/24 03:10 | Takashi Saito v Masaki Sasai | 4-6,6-4,6-4 |
| ITF Japan F2 | 2015/03/20 03:00 | Takuto Niki v Masaki Sasai | 7-5,6-3 |
| ITF Japan F2 | 2015/03/17 04:10 | Masaki Sasai v Arata Onozawa | 6-4,6-4 |
| ITF Japan F2 | 2015/03/15 01:00 | Masaki Sasai v Issei Okamura | 6-3,6-0 |
| ITF Indonesia F3 | 2015/04/15 03:00 | Shuichi Sekiguchi v Finn Tearney | 6-7,6-3,6-7 |
| ITF Indonesia F2 | 2015/04/11 04:00 | Finn Tearney v Shuichi Sekiguchi | 0-6,1-6 |
| ITF Indonesia F2 | 2015/04/10 06:30 | Jeson Patrombon v Shuichi Sekiguchi | 2-6,0-6 |
| ITF Indonesia F2 | 2015/04/08 07:40 | Aaron Cortes Alcaraz v Shuichi Sekiguchi | 2-6,2-6 |
| ITF Japan F4 | 2015/04/02 01:00 | Zhe Li v Shuichi Sekiguchi | 6-4,2-6,6-2 |
| ITF Japan F4 | 2015/04/01 01:00 | Ryotaro Matsumura v Shuichi Sekiguchi | 2-6,4-6 |
| ITF Japan F4 | 2015/03/30 05:00 | Arata Onozawa v Shuichi Sekiguchi | 4-6,4-6 |
| ITF Japan F3 | 2015/03/27 03:25 | Di Wu v Shuichi Sekiguchi | 1-6,7-5,6-2 |