Ground: Hardcourt outdoor
| ITF Japan F3 | 2015/03/27 01:00 | Naoki Nakagawa v Akira Santillan | 2-6,6-0,2-6 |
| ITF Japan F3 | 2015/03/26 02:40 | Shintaro Imai v Naoki Nakagawa | 6-3,2-6,6-7 |
| 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 Turkey F34 | 2014/09/27 07:00 | Ben Mclachlan v Jumpei Yamasaki | 7-5,6-4 |
| ITF Turkey F33 | 2014/09/22 07:00 | Scott Clayton v Jumpei Yamasaki | 3-6,6-7 |
| ITF Italy F13 | 2014/05/07 12:25 | Viktor Galovic v Jumpei Yamasaki | 7-6,6-3 |
| ITF Italy F13 | 2014/05/05 10:00 | Jumpei Yamasaki v Goncalo Oliveira | 6-3,1-6,6-4 |
| ITF Italy F12 | 2014/05/01 09:00 | Jumpei Yamasaki v Gibril Diarra | 6-7,4-6 |
| ITF Italy F12 | 2014/04/30 08:30 | Riccardo Sinicropi v Jumpei Yamasaki | 4-6,6-7 |