| ITF China F2 Qual | 2015/04/06 02:00 | Issei Okamura v Zheng, Zuxin | 6-0,7-6 |
| ITF Japan F4 | 2015/03/29 01:00 | Hong, Seong Chan v Issei Okamura | 6-3,6-3 |
| ITF Japan F4 | 2015/03/28 05:30 | Hashimoto, Taiki v Issei Okamura | 7-6,1-6,1-6 |
| ITF Japan F3 | 2015/03/21 02:30 | Issei Okamura v Watanuki, Keisuke | 6-2,6-3 |
| ITF Japan F2 | 2015/03/15 01:00 | Sasai, Masaki v Issei Okamura | 6-3,6-0 |
| ITF Japan F1 | 2015/03/09 00:40 | Shintaro Imai v Issei Okamura | 6-0,6-1 |
| ITF Japan F8 | 2014/06/24 02:40 | Issei Okamura v Yoshihito Nishioka | 0-6,3-6 |
| ITF Japan F7 | 2014/06/17 02:05 | Issei Okamura v Kikuchi, Gengo | 4-6,2-6 |
| ITF China F2 Qual | 2015/04/03 02:00 | Yang, Tsung-Hua v Yan Bai | 6-1,6-4 |
| ITF China F2 Qual | 2015/04/02 02:00 | Ruikai Wang v Yan Bai | 0-6,1-6 |
| ITF China F2 Qual | 2015/03/31 04:50 | Chen, Long v Yan Bai | 2-6,0-6 |
| Turkey F6, Singles Qualifying | 2015/02/13 08:00 | Niesten, Miliaan v Yan Bai | 6-4,6-3 |
| Turkey F6, Singles Qualifying | 2015/02/12 11:40 | Podzus, Janis v Yan Bai | 1-6,1-6 |
| Turkey F6, Singles Qualifying | 2015/02/12 07:30 | Urbanija, Mike v Yan Bai | 0-6,1-6 |
| ITF Turkey F5 | 2015/02/06 08:00 | Krawietz, Kevin v Yan Bai | 1-6,7-6,6-4 |
| ITF Turkey F5 | 2015/02/05 09:30 | Wattanakul, Pol v Yan Bai | 1-6,4-6 |