| ITF Japan F5 | 2016/04/04 01:30 | Ken Onishi v Koichi Sano | 6-1,6-0 |
| ITF Japan F5 | 2016/04/03 02:30 | Ken Onishi v Kazuki Shimizu | 6-3,6-2 |
| ITF Japan F4 | 2016/03/27 01:00 | Yosuke Watanuki v Ken Onishi | 6-2,7-6 |
| ITF Japan F3 | 2016/03/23 01:00 | Yuya Kibi v Ken Onishi | 7-6,6-1 |
| ITF Japan F3 | 2016/03/22 03:10 | Ken Onishi v Keisuke Watanuki | 2-6,6-2,7-5 |
| ITF Japan F2 | 2016/03/12 02:00 | Tung-Lin Wu v Ken Onishi | 6-2,6-2 |
| ITF Kuwait F3 | 2015/11/26 08:00 | Ken Onishi v Evgeny Karlovskiy | 3-6,2-6 |
| ITF Kuwait F3 | 2015/11/25 12:30 | Ken Onishi v Ali Ghareeb | 6-3,6-2 |
| ITF Japan F3 | 2016/03/19 03:45 | Takao Suzuki v Brandon Walkin | 6-2,6-2 |
| WTA Kuala Lumpur Qual | 2015/09/27 03:20 | Takao Suzuki v Yasutaka Uchiyama | 2-6,2-6 |
| WTA Kuala Lumpur Qual | 2015/09/26 05:45 | Kelsey Stevenson v Takao Suzuki | 6-2,3-6,2-6 |
| Challenger Kaohsiung | 2015/09/22 06:40 | Marco Trungelliti v Takao Suzuki | 6-4,6-2 |
| Challenger Kaohsiung Qual | 2015/09/20 07:05 | Jeevan Nedunchezhiyan v Takao Suzuki | 2-6,5-7 |
| ITF Japan F8 | 2015/06/25 04:45 | Yasutaka Uchiyama v Takao Suzuki | 6-2,4-6,6-2 |
| ITF Guam F1 | 2015/05/31 01:00 | Gengo Kikuchi v Takao Suzuki | 3-6,3-6 |
| ITF Guam F1 | 2015/05/30 02:20 | Takao Suzuki v Katsuki Nagao | 2-6,6-4,6-2 |