Round: 25 Ground: Clay
| ITF Chinese Taipei F1 | 2015/08/21 02:00 | Issei Okamura v Ryota Tanuma | 6-4,3-6,6-3 |
| ITF Japan F5 | 2015/06/01 04:10 | Issei Okamura v Ryota Tanuma | 6-7,4-6 |
| ITF Spain F13 | 2016/05/12 10:10 | Issei Okamura v Juan Lizariturry | 5-7,5-7 |
| ITF Spain F13 | 2016/05/10 16:00 | Issei Okamura v Andrey Chepelev | 3-6,6-4,7-6 |
| ITF Spain F13 | 2016/05/09 08:00 | Issei Okamura v Thibault Cancel | 6-4,5-7,4-6 |
| ITF Spain F13 | 2016/05/07 13:30 | Issei Okamura v Brandon Levendale | 6-2,6-1 |
| ITF Turkey F18 | 2016/05/06 08:00 | Issei Okamura v Hugo Nys | 0-6,3-6 |
| ITF Turkey F18 | 2016/05/05 10:15 | Mikelis Libietis v Issei Okamura | 3-6,2-6 |
| ITF Turkey F18 | 2016/05/03 11:45 | Issei Okamura v Marcelo Tebet | 7-5,6-4 |
| ITF Turkey F17 | 2016/04/28 08:00 | Issei Okamura v Marc Sieber | 7-5,2-6,0-6 |
| ITF Spain F13 | 2016/05/13 08:00 | Ryota Tanuma v Carlos Taberner | 1-6,2-6 |
| ITF Spain F13 | 2016/05/12 08:00 | Ryota Tanuma v Andres Artunedo Martinavarr | 6-4,4-6,6-3 |
| ITF Spain F13 | 2016/05/11 10:30 | Dante Gennaro v Ryota Tanuma | 7-5,6-7,1-6 |
| ITF Spain F13 | 2016/05/09 08:00 | Ryota Tanuma v Pablo Irigaray Guarne | 6-3,7-6 |
| ITF Spain F13 | 2016/05/08 11:00 | Ryota Tanuma v Pol Fernandez | 6-0,6-1 |
| ITF Spain F13 | 2016/05/07 11:15 | Ryota Tanuma v Sergi Perez Contri | 6-3,6-3 |
| ITF Japan F5 | 2016/04/05 02:00 | Ryota Tanuma v Yuya Kibi | 4-6,2-6 |
| ITF Japan F4 | 2016/04/01 01:00 | Ryota Tanuma v Soonwoo Kwon | 2-6,2-6 |