Round: 62 Ground: Clay
| ITF Japan F8 | 2016/06/12 01:00 | Yutaro Matsuzaki v Yohei Otsuka | 6-2,6-2 |
| ITF Japan F8 | 2016/06/11 04:00 | Yohei Otsuka v Takahiro Kubo | 6-2,6-3 |
| ITF Japan F5 | 2016/04/03 02:00 | Taiki Hashimoto v Yohei Otsuka | 6-0,6-1 |
| ITF Japan F3 | 2016/03/19 00:30 | Tung-Lin Wu v Yohei Otsuka | 6-1,6-3 |
| ITF Japan F1 | 2016/03/05 01:00 | Yohei Otsuka v Soichiro Moritani | 3-6,3-6 |
| ITF Japan F6 Qual | 2015/06/07 01:00 | Makoto Ochi v Yohei Otsuka | 3-6,6-0,6-1 |
| ITF Japan F4 | 2015/03/28 00:30 | Ryota Tanuma v Yohei Otsuka | 6-4,6-1 |
| ITF Germany F16 | 2016/10/23 13:00 | Alexander Abou Boutros v Gijs Buntsma | 2-6,0-6 |
| ITF Germany F16 | 2016/10/23 07:30 | Lorenzo Gobet v Alexander Abou Boutros | 2-6,6-2,4-6 |