Round: 26 Ground: Synthetic outdoor
| ITF - Japan F6 | 2017/05/30 03:55 | Kento Takeuchi v Issei Okamura | 7-6,6-3 |
| ITF - Singapur F1 | 2017/05/25 02:00 | Issei Okamura v Kazuki Nishiwaki | 6-7,1-6 |
| ITF - China F7 | 2017/05/16 07:00 | Issei Okamura v Yusuke Takahashi | 7-5,2-6,4-6 |
| ITF - China F6 | 2017/05/10 06:05 | Dayne Kelly v Issei Okamura | 6-4,6-3 |
| ITF - China F6 | 2017/05/08 05:30 | Ruikai Ruikai Wang v Issei Okamura | 3-6,1-6 |
| Challenger - Anning - Qualifikation | 2017/04/22 03:35 | Issei Okamura v Denys Molchanov | 6-4,3-6,4-6 |
| Challenger - Taipei - Qualifikation | 2017/04/17 04:35 | Ruan Roelofse v Issei Okamura | 6-4,6-2 |
| Challenger - Taipei - Qualifikation | 2017/04/16 05:55 | Shao-Fan Liu v Issei Okamura | 6-7,6-4,3-6 |
| ITF - Japan F7 | 2017/06/06 05:40 | Haru Inoue v Tomohiro Masabayashi | 6-1,6-3 |
| ITF - Japan F7 | 2017/06/04 01:00 | Teppei Uesugi v Haru Inoue | 6-3,2-6,2-6 |
| ITF - Japan F7 | 2017/06/03 01:00 | Yuichiro Inui v Haru Inoue | 4-6,2-6 |
| ITF - USA F35 | 2016/10/31 15:00 | Benjamin Sigouin v Haru Inoue | 7-6,6-2 |
| ITF - USA F35 | 2016/10/30 15:00 | Alexander Brown v Haru Inoue | 6-3,6-7,3-6 |
| ITF - USA F35 | 2016/10/29 15:00 | Jarryd Woog v Haru Inoue | 6-2,4-6,2-6 |
| ITF - USA F27 - Qualifikation | 2016/08/07 13:30 | Bradley Holt v Haru Inoue | 7-6,6-4 |
| ITF - USA F27 - Qualifikation | 2016/08/06 13:30 | Oscar Janglin v Haru Inoue | 7-5,2-6,4-6 |