| ITF Japan F6 | 2017/05/30 03:55 | Kento Takeuchi v Issei Okamura | 7-6,6-3 |
| ITF Japan F7 | 2016/06/06 02:50 | Issei Okamura v Kento Takeuchi | 2-6,3-6 |
| ITF Japan F1 | 2016/03/08 01:00 | Issei Okamura v Kento Takeuchi | 7-6,7-6 |
| ITF China F13 | 2017/07/18 07:05 | Jui-Chen Hung v Issei Okamura | 6-4,6-2 |
| ITF Guam F1 | 2017/06/21 02:30 | Takao Suzuki v Issei Okamura | 7-5,6-4 |
| ITF Japan F8 | 2017/06/13 01:30 | Shunrou Takeshima v Issei Okamura | 6-3,7-5 |
| 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 |
| Challenger Astana Qual | 2017/07/15 05:10 | Daniiar Duldaev v Kento Takeuchi | 6-1,6-3 |
| ITF China F10 | 2017/06/30 02:00 | Kento Takeuchi v Yecong He | 3-6,2-6 |
| ITF China F10 | 2017/06/28 02:00 | Kento Takeuchi v Ruikai Wang | 6-2,6-2 |
| ITF China F10 | 2017/06/27 02:00 | Kento Takeuchi v Ang Ji | 6-3,6-1 |
| ITF Chinese Taipei F2 | 2017/06/20 03:50 | Tyler Lu v Kento Takeuchi | 6-4,6-1 |
| ITF Chinese Taipei F1 | 2017/06/16 02:00 | Kento Takeuchi v Tung-Lin Wu | 2-6,4-6 |
| ITF Chinese Taipei F1 | 2017/06/15 03:35 | Kento Takeuchi v Wei-De Lin | 6-4,6-4 |
| ITF Chinese Taipei F1 | 2017/06/14 02:00 | Kento Takeuchi v Yu Hsiang Chiu | 7-5,6-2 |