Round: 26 Ground: Hardcourt outdoor
| ITF Japón F6 | 2015/06/09 04:00 | Koichi Sano v Issei Okamura | 2-6,4-6 |
| ITF China F13 | 2016/07/19 04:00 | Issei Okamura v Ye Cong Mo | 6-2,6-3 |
| ITF China F12 | 2016/07/16 03:00 | Issei Okamura v Kuan-Yi Lee | 6-7,4-6 |
| ITF China F12 | 2016/07/15 04:00 | Mitchell William Robins v Issei Okamura | 3-6,7-5,1-6 |
| ITF China F12 | 2016/07/14 02:30 | Seungri Choi v Issei Okamura | 2-6,7-6,6-7 |
| ITF China F12 | 2016/07/12 06:20 | Wei-De Lin v Issei Okamura | 1-6,4-6 |
| ITF China F11 | 2016/07/09 04:30 | Bastian Trinker v Issei Okamura | 6-3,6-4 |
| ITF China F11 | 2016/07/08 04:00 | Issei Okamura v Rigele Te | 6-3,6-4 |
| ITF China F11 | 2016/07/07 02:00 | Issei Okamura v Kazuma Kawachi | 6-3,6-3 |
| ITF China F13 | 2016/07/19 04:00 | Koichi Sano v Xi Qi | 6-2,7-6 |
| ITF China F12 | 2016/07/13 02:30 | Soichiro Moritani v Koichi Sano | 6-7,6-4,6-1 |
| ITF China F12 | 2016/07/12 02:30 | Zihao Xia v Koichi Sano | 6-7,3-6 |
| ITF Japón F8 | 2016/06/13 01:00 | Koichi Sano v Kaito Uesugi | 2-6,4-6 |
| ITF Japón F8 | 2016/06/11 01:00 | Koichi Sano v Yuga Tashiro | 6-3,7-5 |
| ITF Japón F7 | 2016/06/09 02:00 | Koichi Sano v Sho Katayama | 6-3,2-6,1-6 |
| ITF Japón F7 | 2016/06/07 01:00 | Koichi Sano v Evan Song | 2-6,7-5,6-4 |
| ITF Japón F7 - Clasificación | 2016/06/05 01:00 | Masaki Sasai v Koichi Sano | 3-6,5-7 |