| ITF - Japan F4 | 2014/04/04 01:00 | Issei Okamura v Masato Shiga | 0-6,3-6 |
| ITF - Japan F4 | 2014/04/02 02:45 | Issei Okamura v Masaki Sasai | 6-3,6-3 |
| ITF - Japan F4 | 2014/04/01 03:45 | Yuichi Ito v Issei Okamura | 7-6,2-6,6-7 |
| ITF - Japan F3 | 2014/03/27 03:55 | Yuya Kibi v Issei Okamura | 6-1,6-1 |
| ITF - Japan F3 | 2014/03/25 02:45 | Issei Okamura v Wishaya Trongcharoenchaikul | 6-4,6-2 |
| ITF - Japan F2 | 2014/03/17 01:00 | Issei Okamura v Yuya Kibi | 1-6,3-6 |
| 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 |