Stadium: Court F Round: 45
| ITF Thailand F7 Qual | 2017/10/02 02:30 | Issei Okamura v Matteo Martineau | 6-4,6-7,2-6 |
| ITF Thailand F7 Qual | 2017/10/01 08:25 | Issei Okamura v Jirat Navasirisomboon | 6-3,6-1 |
| ITF Switzerland F5 | 2017/08/28 10:25 | Issei Okamura v Juan Manuel Benitez Chavarriaga | 7-5,5-7,3-6 |
| ITF Switzerland F4 | 2017/08/22 09:25 | Issei Okamura v Raphael Baltensperger | 0-6,6-4,3-6 |
| ITF Switzerland F3 | 2017/08/14 09:00 | Issei Okamura v Maxence Beauge | 1-6,6-7 |
| ITF Thailand F5 | 2017/08/07 05:45 | Issei Okamura v Jacob Grills | 3-6,4-6 |
| ITF Thailand F4 | 2017/08/01 06:00 | Issei Okamura v Calum Puttergill | 5-7,6-0,4-6 |
| ITF China F14 | 2017/07/28 03:00 | Nikola Milojevic v Issei Okamura | 6-2,6-1 |
| ATP Chengdu Qual | 2017/09/23 08:10 | Takuto Niki v Marcos Giron | 2-6,5-7 |
| Challenger Gwangju | 2017/09/19 03:15 | Soonwoo Kwon v Takuto Niki | 6-4,6-1 |
| Challenger Shanghai | 2017/09/12 02:00 | Zihao Xia v Takuto Niki | 2-6,7-6,6-1 |
| Challenger Zhangjiagang | 2017/09/06 05:00 | Yusuke Takahashi v Takuto Niki | 7-5,6-1 |
| Challenger Jinan | 2017/08/07 02:00 | Takuto Niki v Dayne Kelly | 2-6,3-6 |
| Challenger Chengdu | 2017/07/31 03:00 | Takuto Niki v Yibing Wu | 3-6,4-6 |
| ITF China F12 | 2017/07/12 02:00 | Tung-Lin Wu v Takuto Niki | 6-2,6-1 |
| ITF China F12 | 2017/07/11 05:30 | Hao Wu v Takuto Niki | 6-7,2-6 |