| ITF Thailand F9 | 2015/08/05 05:10 | Jirat Navasirisomboon v Issei Okamura | 6-7,5-7 |
| 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 |
| ITF China F14 | 2017/07/26 02:00 | Francis Casey Alcantara v Issei Okamura | 6-4,5-7,2-6 |
| ITF China F14 | 2017/07/24 08:15 | Issei Okamura v Kento Takeuchi | 6-2,6-2 |
| ITF Thailand F7 Qual | 2017/09/30 02:30 | Jirat Navasirisomboon v Chanchai Sookton-Eng | 6-2,4-6,6-2 |
| ITF Thailand F6 | 2017/08/15 02:30 | Jirat Navasirisomboon v Sidharth Rawat | 4-6,3-6 |
| ITF Thailand F5 Qual | 2017/08/06 06:35 | Jirat Navasirisomboon v Phongsapak Kerdlaphee | 6-7,3-6 |
| ITF Thailand F4 | 2017/08/01 06:50 | Jirat Navasirisomboon v Sora Fukuda | 3-6,4-6 |
| ITF Hong Kong F3 | 2017/07/03 02:00 | Eric James Johnson v Jirat Navasirisomboon | 6-3,6-3 |
| ITF Hong Kong F2 | 2017/06/27 04:35 | Mousheg Hovhannisyan v Jirat Navasirisomboon | 6-2,1-6,6-1 |
| ITF Thailand F3 | 2017/06/21 03:00 | Jirat Navasirisomboon v Sidharth Rawat | 2-6,1-6 |
| ITF Thailand F3 | 2017/06/20 03:00 | Kittirat Kerdlaphee v Jirat Navasirisomboon | 3-6,3-6 |