Round: 45 Ground: Hardcourt outdoor
| ITF Japan F7 | 2016/06/06 05:05 | Arata Onozawa v Ken Onishi | 6-4,6-7,6-0 |
| ITF Japan F1 | 2015/03/12 01:00 | Arata Onozawa v Ken Onishi | 3-6,6-1,5-7 |
| Challenger Kobe | 2016/11/09 05:00 | Ken Onishi v Go Soeda | 0-6,6-7 |
| Challenger Kobe | 2016/11/08 02:00 | Makoto Ochi v Ken Onishi | 3-6,1-6 |
| ITF Vietnam F9 | 2016/11/01 04:10 | Evan Song v Ken Onishi | 2-6,6-4,6-2 |
| ITF Vietnam F8 | 2016/10/29 03:00 | Rishab Agarwal v Ken Onishi | 6-1,6-3 |
| ITF Vietnam F8 | 2016/10/28 03:00 | Ken Onishi v Evan Song | 7-5,4-6,6-4 |
| ITF Vietnam F8 | 2016/10/27 04:30 | Nam Hoang Ly v Ken Onishi | 7-5,4-6,2-6 |
| ITF Vietnam F8 | 2016/10/24 05:00 | Francis Casey Alcantara v Ken Onishi | 3-6,4-6 |
| ITF Vietnam F7 | 2016/10/19 07:30 | Nam Hoang Ly v Ken Onishi | 6-1,6-3 |
| ITF Vietnam F4 | 2016/09/15 03:00 | Arata Onozawa v Congsup Congcar | 5-7,4-6 |
| ITF Vietnam F4 | 2016/09/12 03:00 | Arata Onozawa v Koichi Sano | 2-6,7-6,6-0 |
| ITF Korea F7 | 2016/09/01 04:05 | Makoto Ochi v Arata Onozawa | 6-2,6-2 |
| ITF Korea F7 | 2016/08/31 02:00 | Jung-Woong Na v Arata Onozawa | 6-7,5-7 |
| ITF Korea F7 | 2016/08/29 02:30 | Arata Onozawa v Gengo Kikuchi | 3-6,6-2,6-3 |
| ITF Korea F8 | 2016/08/24 04:20 | Makoto Ochi v Arata Onozawa | 6-3,6-2 |
| ITF Korea F8 | 2016/08/23 03:25 | Seungri Choi v Arata Onozawa | 3-6,3-6 |
| ITF Vietnam F8 | 2016/08/09 02:00 | Arata Onozawa v Jui-Chen Hung | 6-3,6-3 |