Ground: Synthetic outdoor
| ITF Japan F7 | 2015/06/18 00:30 | Arata Onozawa v Renta Tokuda | 6-4,6-2 |
| ITF Japan F7 | 2015/06/16 02:15 | Arata Onozawa v Keisuke Watanuki | 7-6,0-6,6-3 |
| ITF Japan F5 | 2015/06/02 01:00 | Makoto Ochi v Arata Onozawa | 3-6,6-2,6-4 |
| ITF China F6 | 2015/05/26 07:20 | Arata Onozawa v Peng-Xiang Gong | 6-0,6-2 |
| ITF China F6 | 2015/05/20 02:00 | Arata Onozawa v Xi Qi | 4-6,1-6 |
| ITF Thailand F9 | 2015/05/06 03:00 | Arata Onozawa v Phassawit Bura'ritta | 6-2,0-6,5-7 |
| ITF Thailand F9 | 2015/05/05 04:25 | Arata Onozawa v Makoto Ochi | 6-3,6-3 |
| ITF Thailand F9 | 2015/04/29 04:55 | Warit Sornbutnark v Arata Onozawa | 6-3,6-2 |
| ITF Japan F7 | 2015/06/18 00:30 | Jumpei Yamasaki v Ben Mclachlan | 6-4,6-4 |
| ITF Japan F7 Qual | 2015/06/14 00:00 | Jumpei Yamasaki v Yosuke Watanuki | 7-5,6-3 |
| ITF Japan F6 | 2015/06/11 01:00 | Yuya Kibi v Jumpei Yamasaki | 7-6,6-2 |
| ITF Japan F6 | 2015/06/10 01:30 | Ku Keon Kang v Jumpei Yamasaki | 4-6,6-7 |
| ITF Italy F30 | 2015/05/04 08:00 | Filippo Leonardi v Jumpei Yamasaki | 7-5,3-6,6-3 |
| ITF Italy F7 | 2015/04/27 11:35 | Jumpei Yamasaki v Federico Maccari | 4-6,5-7 |
| ITF Japan F4 | 2015/04/01 01:00 | Jumpei Yamasaki v Yusuke Watanuki | 6-7,3-6 |
| ITF Japan F4 | 2015/03/30 05:00 | Naoki Nakagawa v Jumpei Yamasaki | 6-7,4-6 |