| ITF Japan F5 | 2015/06/04 01:00 | Hiromasa Oku v Yuichi Ito | 6-0,6-1 |
| ITF Japan F5 | 2015/06/02 03:15 | Hiromasa Oku v Koichi Sano | 6-4,3-6,6-2 |
| ITF Guam F1 | 2015/05/29 00:00 | Hiromasa Oku v Takao Suzuki | 6-4,6-7,5-7 |
| ITF Guam F1 | 2015/05/27 00:00 | Hiromasa Oku v Masayoshi Ono | 6-0,6-2 |
| ITF Guam F1 | 2015/05/26 00:00 | Hiromasa Oku v Masaki Sasai | 6-1,6-1 |
| ITF Thailand F9 | 2015/04/28 03:00 | Yuichi Ito v Hiromasa Oku | 6-4,2-6,4-6 |
| ITF Thailand F9 | 2015/04/22 07:50 | Hiromasa Oku v Yong-Kyu Lim | 3-6,1-6 |
| ITF Thailand F9 | 2015/04/20 03:00 | Jacob Grills v Hiromasa Oku | 6-2,3-6,1-6 |
| ITF Japan F5 | 2015/06/03 06:00 | Ryota Tanuma v Makoto Ochi | 5-7,4-6 |
| ITF Japan F5 | 2015/06/02 01:00 | Makoto Ochi v Arata Onozawa | 3-6,6-2,6-4 |
| ITF Thailand F9 | 2015/05/05 04:25 | Arata Onozawa v Makoto Ochi | 6-3,6-3 |
| ITF Thailand F9 | 2015/05/03 03:00 | Jeson Patrombon v Makoto Ochi | 5-7,1-6 |
| ITF Thailand F9 | 2015/05/02 03:00 | Marut Klaoklang v Makoto Ochi | 0-6,0-6 |
| ITF Thailand F9 | 2015/04/29 06:15 | Makoto Ochi v Nam Hoang Ly | 5-7,2-6 |
| ITF Thailand F9 | 2015/04/28 05:35 | Kittiphong Wachiramanowong v Makoto Ochi | 6-7,3-6 |
| ITF Thailand F9 | 2015/04/25 06:30 | Makoto Ochi v Kelsey Stevenson | 7-5,7-6 |