Ground: Hardcourt outdoor
| ITF Japan F2 | 2015/03/22 02:00 | Takuto Niki v Shintaro Imai | 6-7,6-4,6-2 |
| ITF Japan F2 | 2015/03/21 02:00 | Shintaro Imai v Chu-Huan Yi | 6-4,6-1 |
| ITF Japan F2 | 2015/03/20 01:30 | Pietro Licciardi v Shintaro Imai | 1-6,2-6 |
| ITF Japan F2 | 2015/03/18 01:00 | Shintaro Imai v Kento Takeuchi | 6-2,6-2 |
| ITF Japan F1 | 2015/03/11 01:00 | Takuto Niki v Shintaro Imai | 5-7,7-6,6-4 |
| ITF Japan F1 | 2015/03/09 00:40 | Shintaro Imai v Issei Okamura | 6-0,6-1 |
| ITF Japan F4 | 2014/03/31 04:00 | Shintaro Imai v Takashi Saito | 5-7,6-7 |
| ITF Japan F3 | 2014/03/27 04:00 | Takuto Niki v Shintaro Imai | 7-5,6-2 |
| ITF Japan F3 | 2015/03/25 02:50 | Jui-Chen Hung v Naoki Nakagawa | 5-7,2-6 |
| ITF Japan F2 | 2015/03/17 01:00 | Makoto Ochi v Naoki Nakagawa | 6-2,7-5 |
| ITF USA F9 Qual | 2015/02/22 16:00 | Alfredo Perez v Naoki Nakagawa | 6-3,6-1 |
| ITF USA F9 Qual | 2015/02/21 18:00 | McClain Kessler v Naoki Nakagawa | 3-6,4-6 |
| ITF USA F9 Qual | 2015/02/20 22:30 | Alonso A Delgado v Naoki Nakagawa | 2-6,0-6 |
| ITF USA F8 | 2015/02/20 17:00 | Joao Menezes v Naoki Nakagawa | 2-6,6-4,6-2 |
| ITF USA F8 Qual | 2015/02/16 16:30 | Naoki Nakagawa v Jacob Kahoun | 6-2,6-2 |
| ITF USA F8 Qual | 2015/02/15 16:30 | Naoki Nakagawa v Emil Reinberg | 7-5,6-4 |