Round: 25 Ground: Clay
| 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 |
| ITF Japan F8 | 2016/06/19 02:00 | Gengo Kikuchi v Yusuke Watanuki | 4-6,7-6,6-0 |
| ITF Japan F8 | 2016/06/18 01:00 | Gengo Kikuchi v Yuki Mochizuki | 6-3,7-6 |
| ITF Japan F8 | 2016/06/17 01:00 | Yuya Kibi v Gengo Kikuchi | 6-7,6-3,3-6 |
| ITF Japan F8 | 2016/06/16 02:50 | Gengo Kikuchi v Kazuki Nishiwaki | 7-6,6-4 |
| ITF Japan F8 | 2016/06/14 03:00 | Gengo Kikuchi v Masaki Sasai | 7-5,6-4 |
| ITF Japan F7 | 2016/06/06 01:00 | Gengo Kikuchi v Evan King | 4-6,4-6 |
| ITF Japan F6 | 2016/06/03 03:10 | Gengo Kikuchi v Deiton Baughman | 1-6,4-6 |
| ITF Japan F6 | 2016/06/02 01:00 | Andrew Whittington v Gengo Kikuchi | 3-6,3-6 |