| ITF Japan F5 | 2014/06/03 02:30 | Takashi Saito v Hiromasa Oku | 2-6,4-6 |
| ITF Korea F1 Qual | 2014/04/29 00:30 | Jung-Woong Na v Hiromasa Oku | 6-3,6-4 |
| ITF Japan F3 | 2014/03/24 01:00 | Hiromasa Oku v Yutaro Matsuzaki | 2-6,4-6 |
| ITF Japan F2 | 2014/03/18 01:00 | Hiromasa Oku v Takuto Niki | 6-7,3-6 |
| ITF Japan F1 | 2014/03/11 01:00 | Hiroka Kondo v Hiromasa Oku | 7-5,6-3 |
| ITF Japan F5 | 2014/06/02 01:00 | Issei Okamura v Katsuki Nagao | 1-6,6-7 |
| ITF Guam F1 | 2014/05/30 00:00 | Yuya Kibi v Katsuki Nagao | 6-3,6-3 |
| ITF Guam F1 | 2014/05/29 00:00 | Kody Pearson v Katsuki Nagao | 1-6,1-6 |
| ITF Japan F4 | 2014/04/02 01:00 | Shunrou Takeshima v Katsuki Nagao | 6-4,6-4 |
| ITF Japan F3 | 2014/03/26 01:00 | Duckhee Lee v Katsuki Nagao | 6-0,6-7,7-6 |