Ground: Hardcourt outdoor
| ITF Japan F1 | 2015/03/10 01:00 | Arata Onozawa v Taiki Hashimoto | 6-2,6-1 |
| ITF Turkey F2 | 2015/01/17 07:00 | Arata Onozawa v Alexey Vatutin | 2-6,2-6 |
| ITF Turkey F2 | 2015/01/15 12:55 | Miki Jankovic v Arata Onozawa | 4-6,7-6,0-6 |
| ITF Turkey F1 | 2015/01/08 08:00 | Hugo Nys v Arata Onozawa | 6-1,6-2 |
| ITF Turkey F1 | 2015/01/07 08:00 | Gleb Alekseenko v Arata Onozawa | 4-6,4-6 |
| ITF Australia F7 | 2014/10/05 23:00 | Mitchell Krueger v Arata Onozawa | 6-2,6-4 |
| ITF Australia F6 | 2014/09/29 00:30 | Daniel Hobart v Arata Onozawa | 6-7,6-4,6-4 |
| ITF Chinese Taipei F1 | 2014/08/22 02:00 | Liang-Chi Huang v Arata Onozawa | 6-1,6-4 |
| ITF Japan F1 | 2015/03/11 01:00 | Takumi Tsunematsu v Ken Onishi | 3-6,3-6 |
| ITF Japan F1 | 2015/03/09 00:40 | Yohei Ono v Ken Onishi | 2-6,1-6 |
| ITF Australia F2 | 2015/03/04 02:55 | Brydan Klein v Ken Onishi | 6-3,6-2 |
| ITF Australia F2 Qual | 2015/03/01 23:30 | Ken Onishi v Blazo N Djurovic | 6-3,7-6 |
| ITF Australia F1 | 2015/02/24 01:00 | Ken Onishi v Gavin Van Peperzeel | 3-6,4-6 |
| ITF Australia F1 Qual | 2015/02/22 23:30 | Ken Onishi v William Ma | 6-3,7-5 |
| ITF Australia F1 Qual | 2015/02/22 00:30 | Ken Onishi v Marlino Pascual | 6-1,6-2 |
| ITF Tunisia F9 | 2014/11/24 10:55 | Vasko Mladenov v Ken Onishi | 6-1,6-3 |