Round: 26 Ground: Synthetic outdoor
| ITF Japan F7 | 2016/06/06 04:40 | Yusuke Watanuki v Shunrou Takeshima | 7-5,6-4 |
| ITF Japan F5 | 2016/04/06 04:15 | Masato Shiga v Yusuke Watanuki | 7-6,6-4 |
| ITF Japan F1 | 2016/03/10 02:45 | Katsuki Nagao v Yusuke Watanuki | 1-6,6-2,1-6 |
| ITF Turkey F5 | 2016/02/03 08:00 | Germain Gigounon v Yusuke Watanuki | 6-1,4-6,6-4 |
| ITF Turkey F4 | 2016/01/26 11:05 | Yusuke Watanuki v Tallon Griekspoor | 3-6,1-6 |
| ITF Turkey F3 | 2016/01/22 13:40 | Joris De Loore v Yusuke Watanuki | 6-3,6-0 |
| ITF Turkey F3 | 2016/01/22 09:00 | Altug Celikbilek v Yusuke Watanuki | 3-6,6-7 |
| ITF Turkey F3 | 2016/01/19 08:00 | Hannes Wagner v Yusuke Watanuki | 5-7,1-6 |
| ITF Japan F7 | 2016/06/06 01:00 | Ryota Tanuma v Naoto Kai | 6-4,6-3 |
| ITF Japan F6 | 2016/05/31 04:25 | Kento Takeuchi v Ryota Tanuma | 6-3,3-6,6-2 |
| ITF Spain F15 | 2016/05/27 16:05 | Eduardo Struvay v Ryota Tanuma | 6-4,6-2 |
| ITF Spain F15 Qual | 2016/05/23 10:20 | Ryota Tanuma v Leo Julien Sebaoun | 7-6,4-6,6-2 |
| ITF Spain F15 Qual | 2016/05/21 12:30 | Ryota Tanuma v Alex M Pujolras | 6-0,6-1 |
| ITF Spain F14 | 2016/05/18 10:00 | Ryota Tanuma v Jaume Munar | 6-4,2-6,5-7 |
| ITF Spain F14 | 2016/05/16 09:00 | Issei Okamura v Ryota Tanuma | 0-6,3-6 |
| ITF Spain F13 | 2016/05/13 08:00 | Ryota Tanuma v Carlos Taberner | 1-6,2-6 |