Round: 25 Ground: Clay
| ITF Japan F7 | 2017/06/05 03:05 | Shunrou Takeshima v Kento Takeuchi | 1-6,1-6 |
| ITF Japan F7 | 2017/06/04 01:00 | Shunrou Takeshima v Yuga Tashiro | 4-6,6-2,6-0 |
| ITF Japan F7 | 2017/06/03 01:00 | Shunrou Takeshima v Yuki Nakamura | 7-6,7-6 |
| ITF Japan F6 | 2017/05/30 01:00 | Tomohiro Masabayashi v Shunrou Takeshima | 6-1,1-6,6-4 |
| ITF Japan F6 Qual | 2017/05/28 01:00 | Shunrou Takeshima v Yuki Nakamura | 5-7,7-6,6-2 |
| ITF Japan F6 Qual | 2017/05/27 01:00 | Shunrou Takeshima v Takahiro Kubo | 6-0,6-1 |
| ITF Japan F5 | 2017/04/03 02:45 | Shunrou Takeshima v Gengo Kikuchi | 0-6,4-6 |
| ITF Japan F5 | 2017/04/02 01:00 | Shunrou Takeshima v Ibuki Furuta | 6-2,6-2 |
| ITF Japan F7 | 2017/06/07 03:35 | Issei Okamura v Haru Inoue | 6-7,2-6 |
| ITF Japan F6 | 2017/05/30 03:55 | Kento Takeuchi v Issei Okamura | 7-6,6-3 |
| ITF Singapore 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 Wang v Issei Okamura | 3-6,1-6 |
| Challenger Anning Qual | 2017/04/22 03:35 | Issei Okamura v Denys Molchanov | 6-4,3-6,4-6 |
| Challenger Taipei Qual | 2017/04/17 04:35 | Ruan Roelofse v Issei Okamura | 6-4,6-2 |