Round: 45 Ground: Hardcourt outdoor
| ITF - Taiwan F1 | 2015/08/20 03:30 | Masato Shiga v Issei Okamura | 4-6,4-6 |
| ITF - Japan F4 | 2014/04/04 01:00 | Issei Okamura v Masato Shiga | 0-6,3-6 |
| ITF - Taiwan F1 | 2016/10/11 02:00 | Tung-Lin Wu v Issei Okamura | 6-2,3-6,6-2 |
| ITF - Vietnam F5 | 2016/09/22 03:00 | Issei Okamura v Shinta Fujii | 3-6,6-7 |
| ITF - Vietnam F5 | 2016/09/20 03:00 | Issei Okamura v Ren Nakamura | 6-2,6-3 |
| ITF - Vietnam F4 | 2016/09/16 03:00 | Yuichi Ito v Issei Okamura | 6-2,4-6,6-4 |
| ITF - Vietnam F4 | 2016/09/15 03:30 | Seungri Choi v Issei Okamura | 4-6,3-6 |
| ITF - Vietnam F4 | 2016/09/13 07:10 | Chan-Yeong Oh v Issei Okamura | 6-7,3-6 |
| ITF - Thailand F3 | 2016/09/07 02:00 | Issei Okamura v Jumpei Yamasaki | 6-4,2-6,4-6 |
| ITF - Thailand F3 | 2016/09/05 03:00 | Issei Okamura v Natthasith Kunsuwan | 6-2,6-4 |
| ITF - Vietnam F7 | 2016/10/23 03:00 | Sang-Woo Noh v Masato Shiga | 3-6,1-6 |
| ITF - Vietnam F7 | 2016/10/22 03:00 | Masato Shiga v Rhett Purcell | 7-5,6-4 |
| ITF - Vietnam F7 | 2016/10/21 05:35 | Nam Hoang Ly v Masato Shiga | 5-7,4-6 |
| Challenger - Ningbo | 2016/10/19 04:20 | Thien Nguyen Hoang v Masato Shiga | 5-7,7-5,2-6 |
| ITF - Vietnam F7 | 2016/10/17 03:00 | Ahmed Deedat Abdul Razak v Masato Shiga | 2-6,3-6 |
| Challenger - Ho-Chi-Minh-Stadt - Qualifikation | 2016/10/09 10:55 | Masato Shiga v N. Vijay Sundar Prashanth | 2-6,0-6 |
| Challenger - Ho-Chi-Minh-Stadt - Qualifikation | 2016/10/08 10:50 | Masato Shiga v Cheng-Peng Hsieh | 6-0,6-1 |
| ITF - Vietnam F6 | 2016/09/30 03:00 | Xin Gao v Masato Shiga | 7-6,7-6 |