| ITF Japan F6 | 2014/06/10 01:30 | Katsuki Nagao v Jui-Chen Hung | 6-7,7-5,2-6 |
| ITF Japan F5 | 2014/06/04 01:00 | Hiromasa Oku v Katsuki Nagao | 7-6,7-6 |
| 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 |
| ITF Japan F6 | 2014/06/11 07:25 | Yohei Ono v Atsushi Ushida | 6-7,4-6 |
| ITF Japan F5 | 2014/06/02 03:00 | Gengo Kikuchi v Yohei Ono | 6-4,6-2 |
| ITF Japan F3 | 2014/03/26 01:00 | Yohei Ono v Sho Katayama | 2-6,3-6 |
| ITF Japan F3 | 2014/03/24 01:00 | Yohei Ono v Yuki Nakamura | 6-2,6-1 |
| ITF Japan F2 | 2014/03/17 01:00 | Gengo Kikuchi v Yohei Ono | 3-6,6-4,6-2 |
| ITF Japan F1 | 2014/03/14 03:20 | Yohei Ono v Liang-Chi Huang | 2-6,6-4,0-6 |