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 |
| ITF Zimbabwe F3 | 2016/07/05 10:45 | Jessy Kalambay v Ken Onishi | 6-4,7-5 |
| ITF Zimbabwe F2 | 2016/06/28 08:00 | Ken Onishi v Vishnu Vardhan | 4-6,3-6 |
| ITF Zimbabwe F1 | 2016/06/21 08:00 | Ken Onishi v Shane Vinsant | 6-3,3-6,5-7 |
| ITF Japan F8 | 2016/06/14 04:25 | Renta Tokuda v Ken Onishi | 6-0,7-5 |
| ITF Japan F7 | 2016/06/06 05:05 | Arata Onozawa v Ken Onishi | 6-4,6-7,6-0 |
| ITF Japan F6 | 2016/05/31 02:30 | Ken Onishi v Gengo Kikuchi | 1-6,4-6 |
| ITF Guam F1 | 2016/05/23 00:00 | Deiton Baughman v Ken Onishi | 6-1,6-4 |
| ITF India F3 | 2016/05/11 04:00 | Ken Onishi v Yuya Ito | 4-6,4-6 |
| ITF Hong Kong F3 | 2016/06/22 22:00 | Sami Reinwein v Arata Onozawa | 6-2,6-2 |
| ITF Hong Kong F3 | 2016/06/21 22:00 | David Agung Susanto v Arata Onozawa | 3-6,4-6 |
| ITF Hong Kong F3 | 2016/06/19 22:00 | Ryota Tanuma v Arata Onozawa | 1-6,5-7 |
| ITF Hong Kong F2 Qual | 2016/06/15 22:00 | Mikelis Libietis v Arata Onozawa | 6-4,7-6 |
| ITF Hong Kong F2 Qual | 2016/06/14 22:00 | Zihao Xia v Arata Onozawa | 4-6,2-6 |
| ITF Japan F7 | 2016/06/08 03:30 | Yuya Ito v Arata Onozawa | 6-4,6-1 |
| ITF Japan F7 | 2016/06/06 05:05 | Arata Onozawa v Ken Onishi | 6-4,6-7,6-0 |
| ITF Japan F6 | 2016/05/31 01:00 | Makoto Ochi v Arata Onozawa | 6-2,6-3 |