Round: 62 Ground: Hardcourt outdoor
| ITF Turkey F17 | 2017/04/30 07:00 | Yohei Otsuka v Michiel de Krom | 2-6,2-6 |
| ITF Turkey F16 | 2017/04/22 06:00 | Yohei Otsuka v Daniel Mora | 0-6,1-6 |
| ITF Japan F3 | 2017/03/18 00:30 | Yohei Otsuka v Zhaoyi Cao | 1-6,3-6 |
| ITF Japan F1 | 2017/03/05 01:00 | Yohei Ono v Yohei Otsuka | 6-3,6-3 |
| 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 |