Ground: Hardcourt outdoor
| ITF - Japan F3 | 2014/03/24 01:00 | Hiromasa Oku v Yutaro Matsuzaki | 2-6,4-6 |
| ITF - Japan F1 | 2015/03/07 03:00 | Jarryd Chaplin v Yutaro Matsuzaki | 6-3,6-2 |
| ITF - Japan F3 | 2014/03/26 02:25 | Yutaro Matsuzaki v Yuichi Ito | 0-6,2-6 |
| ITF - Japan F3 | 2014/03/24 01:00 | Hiromasa Oku v Yutaro Matsuzaki | 2-6,4-6 |
| ITF - Japan F1 | 2015/03/10 01:00 | Yuichi Ito v Hiromasa Oku | 6-2,6-4 |
| ITF - Hong Kong F2 | 2014/07/14 03:30 | Gengo Kikuchi v Hiromasa Oku | 6-7,6-4,6-2 |
| ITF - Japan F8 | 2014/06/26 03:30 | Hiromasa Oku v Yoshihito Nishioka | 0-6,3-6 |
| ITF - Japan F8 | 2014/06/25 01:00 | Soichiro Moritani v Hiromasa Oku | 3-6,3-6 |
| ITF - Japan F7 | 2014/06/22 06:40 | Yuya Kibi v Hiromasa Oku | 6-4,6-3 |
| ITF - Japan F7 | 2014/06/21 03:20 | Yohei Ono v Hiromasa Oku | 2-6,4-6 |
| ITF - Japan F6 | 2014/06/14 02:00 | Hiromasa Oku v Yuya Kibi | 0-6,2-6 |
| ITF - Japan F6 | 2014/06/13 02:50 | Shunrou Takeshima v Hiromasa Oku | 1-6,0-6 |