| ITF Japan F7 | 06/08 03:30 | 26 | 이토, 유야 v Onozawa, Arata | 6-4,6-1 | |
| ITF Japan F7 | 06/06 05:05 | 25 | Onozawa, Arata v 오니시, 켄 | 6-4,6-7,6-0 | |
| ITF Japan F6 | 05/31 01:00 | 25 | 오치, 마코토 v Onozawa, Arata | 6-2,6-3 | |
| ITF China F7 | 05/17 04:30 | 25 | Onozawa, Arata v 린, 웨이더 | 3-6,3-6 | |
| ITF China F6 | 05/12 02:00 | 26 | Onozawa, Arata v 기어츠, 미가엘 | 4-6,6-7 | |
| ITF China F6 | 05/10 04:20 | 25 | Ning, Yuqing v Onozawa, Arata | 3-6,7-5,4-6 | |
| ITF Japan F5 | 04/08 01:00 | 26 | Onozawa, Arata v 이토, 유이치 | 6-1,6-7,4-6 | |
| ITF Japan F5 | 04/05 07:30 | 25 | Onozawa, Arata v 우스기, 카이토 | 6-3,6-4 | |
| ITF Japan F2 | 03/14 02:00 | 25 | Takeuchi, Kento (1987) v Onozawa, Arata | Retired | |
| ITF Japan F1 | 03/10 07:45 | 26 | 사이토, 타카시 v Onozawa, Arata | Retired | |
| ITF Japan F1 | 03/10 04:25 | 25 | Onozawa, Arata v Kondo, Hiroki | Retired | |
| ITF China F2 | 02/24 02:00 | 26 | Onozawa, Arata v Ubiergo, Jordan | 3-6,2-6 | |
| ITF China F2 | 02/22 05:20 | 25 | 두안, 지아치 v Onozawa, Arata | 6-7,3-6 | |
| ITF China F1 | 02/18 03:40 | 26 | Ubiergo, Jordan v Onozawa, Arata | 7-5,2-6,6-3 | |
| ITF China F1 | 02/17 06:10 | 25 | 치, 시 v Onozawa, Arata | 2-6,2-6 | |
| ITF Chinese Taipei F1 | 08/18 02:00 | 25 | Onozawa, Arata v 이, 관이 | Retired | |
| ITF China F13 | 08/14 02:00 | 27 | Onozawa, Arata v 양, 충화 | 4-6,6-7 | |
| ITF China F13 | 08/13 02:00 | 26 | Kibi, Yuya v Onozawa, Arata | 6-1,1-6,2-6 | |
| ITF China F13 | 08/12 02:00 | 25 | Onozawa, Arata v Hadavi, Shawn H | 6-3,6-0 | |
| ITF China F12 | 08/09 07:00 | 29 | Onozawa, Arata v 바이, 이앤 | 2-6,3-6 | |
| ITF China F12 | 08/08 03:05 | 28 | Onozawa, Arata v 이, 덕희 | 6-2,0-6,6-4 | |
| ITF China F12 | 08/07 07:00 | 27 | Onozawa, Arata v Cao, Zhaoyi | 6-0,6-2 | |
| ITF China F12 | 08/05 08:00 | 26 | Huang, Liang-Chi v Onozawa, Arata | Retired | |
| ITF China F12 | 08/04 01:30 | 25 | Onozawa, Arata v 치우, 저우양 | 6-4,6-0 | |
| ITF Japan F8 | 06/26 03:35 | - | 우치야마, 야스타카 v Onozawa, Arata | 6-4,6-4 | |
| ITF Japan F8 | 06/25 02:50 | - | 문, 주해 v Onozawa, Arata | 2-6,0-6 | |
| ITF Japan F8 | 06/24 01:10 | - | 오노, 마사요시 v Onozawa, Arata | 2-6,2-6 | |
| ITF Japan F7 | 06/19 03:00 | - | Onozawa, Arata v 야마사키, 점페이 | 6-2,4-6,0-6 | |
| ITF Japan F7 | 06/18 00:30 | - | Onozawa, Arata v 토쿠다, 렌타 | 6-4,6-2 | |
| ITF Japan F7 | 06/16 02:15 | - | Onozawa, Arata v Watanuki, Keisuke | 7-6,0-6,6-3 |