Round: 25 Ground: Hardcourt outdoor
| ITF Korea F7 | 2016/09/01 04:05 | Makoto Ochi v Onozawa, Arata | 6-2,6-2 |
| ITF Korea F7 | 2016/08/31 02:00 | Na, Jung-Woong v Onozawa, Arata | 6-7,5-7 |
| ITF Korea F7 | 2016/08/29 02:30 | Onozawa, Arata v Kikuchi, Gengo | 3-6,6-2,6-3 |
| ITF Korea F8 | 2016/08/24 04:20 | Makoto Ochi v Onozawa, Arata | 6-3,6-2 |
| ITF Korea F8 | 2016/08/23 03:25 | Choi, Seungri v Onozawa, Arata | 3-6,3-6 |
| ITF Vietnam F8 | 2016/08/09 02:00 | Onozawa, Arata v Hung, Jui-Chen | 6-3,6-3 |
| ITF Vietnam F8 | 2016/08/04 02:30 | Onozawa, Arata v Mukund Sasikumar | 1-6,3-6 |
| ITF Vietnam F8 | 2016/08/02 02:00 | Onozawa, Arata v Kanar, Jonathan | 7-5,6-4 |
| ITF China F13 | 2016/07/20 02:30 | Issei Okamura v Sano, Koichi | 6-0,6-2 |
| ITF China F13 | 2016/07/19 04:00 | Sano, Koichi v Qi, Xi | 6-2,7-6 |
| ITF China F12 | 2016/07/13 02:30 | Moritani, Soichiro v Sano, Koichi | 6-7,6-4,6-1 |
| ITF China F12 | 2016/07/12 02:30 | Xia, Zihao v Sano, Koichi | 6-7,3-6 |
| ITF Japan F8 | 2016/06/13 01:00 | Sano, Koichi v Kaito Uesugi | 2-6,4-6 |
| ITF Japan F8 | 2016/06/11 01:00 | Sano, Koichi v Tashiro, Yuga | 6-3,7-5 |
| ITF Japan F7 | 2016/06/09 02:00 | Sano, Koichi v Katayama, Sho | 6-3,2-6,1-6 |
| ITF Japan F7 | 2016/06/07 01:00 | Sano, Koichi v Song, Evan | 2-6,7-5,6-4 |