| ITF - Japan F7 | 2015/06/19 03:00 | Hiromasa Oku v Yusuke Watanuki | 2-6,3-6 |
| ITF - Japan F7 | 2015/06/18 02:05 | Hiromasa Oku v Makoto Ochi | 6-4,6-3 |
| ITF - Japan F7 | 2015/06/16 00:30 | Hiromasa Oku v Ku Keon Kang | 6-2,6-1 |
| ITF - Japan F6 | 2015/06/10 01:30 | Keisuke Watanuki v Hiromasa Oku | 6-2,6-3 |
| ITF - Japan F5 | 2015/06/06 03:00 | Takashi Saito v Hiromasa Oku | 6-3,6-1 |
| ITF - Japan F5 | 2015/06/05 02:35 | Hiromasa Oku v Makoto Ochi | 2-6,6-2,6-4 |
| 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 - Japan F6 | 2015/06/10 02:20 | Sho Katayama v Toshihide Matsui | 7-5,3-6,4-6 |
| ITF - Guam F1 | 2015/05/29 05:10 | Ko Suzuki v Sho Katayama | 6-3,4-6,6-2 |
| ITF - Guam F1 | 2015/05/28 00:00 | Thomas Fancutt v Sho Katayama | 6-3,2-6,4-6 |
| ITF - Thailand F9 | 2015/05/04 03:00 | Sho Katayama v Jacob Grills | 5-7,4-6 |
| ITF - Thailand F9 | 2015/04/28 05:30 | Jacob Grills v Sho Katayama | 6-1,3-6,6-4 |
| ITF - Thailand F9 | 2015/04/21 05:25 | Sho Katayama v Yong-Kyu Lim | 4-6,3-6 |
| ITF - Japan F4 | 2015/04/01 01:00 | Sho Katayama v Kento Takeuchi | 3-6,3-6 |
| ITF - Japan F4 | 2015/03/31 03:50 | Sho Katayama v Xin Gao | 6-2,6-1 |