Round: 62 Ground: Hardcourt outdoor
| ITF Japan F7 Qual | 2015/06/14 00:00 | Jumpei Yamasaki v Yosuke Watanuki | 7-5,6-3 |
| ITF Japan F6 | 2015/06/11 01:00 | Yosuke Watanuki v Masaki Sasai | 3-6,2-6 |
| ITF Japan F6 | 2015/06/10 01:30 | Yosuke Watanuki v Katsuki Nagao | 7-6,6-7,6-4 |
| ITF Japan F7 | 2014/06/18 02:00 | Yosuke Watanuki v Takashi Saito | 1-6,1-6 |
| ITF Japan F6 Qual | 2014/06/07 00:00 | Shohei Chikami v Yosuke Watanuki | 6-1,7-6 |
| 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 Kuwait F3 | 2015/11/23 10:15 | Sergio Martos Gornes v Ken Onishi | 4-6,1-6 |
| ITF Kuwait F2 | 2015/11/18 09:00 | Ken Onishi v Paul Monteban | 6-7,6-7 |
| ITF Kuwait F2 | 2015/11/16 07:00 | Stefan Micov v Ken Onishi | 4-6,1-6 |
| ITF Turkey F36 | 2015/10/07 07:00 | Ken Onishi v Patrik Fabian | 4-6,6-3,3-6 |
| ITF Turkey F38 | 2015/09/25 13:30 | Peter Heller v Ken Onishi | 6-1,6-2 |
| ITF Turkey F38 | 2015/09/24 14:30 | Ken Onishi v Sefa Suluoglu | 6-1,2-6,7-5 |