Ground: Clay
| ITF Japan F6 | 2014/06/11 07:10 | Renta Tokuda v Watanuki, Yusuke | 2-6,2-6 |
| ITF Japan F4 | 2015/04/02 01:00 | Ehara, Hiroyasu v Watanuki, Yusuke | 6-3,2-6,6-2 |
| ITF Japan F4 | 2015/04/01 01:00 | Jumpei Yamasaki v Watanuki, Yusuke | 6-7,3-6 |
| ITF Japan F4 | 2015/03/31 01:00 | Akira Santillan v Watanuki, Yusuke | 4-6,6-0,5-7 |
| ITF Japan F3 | 2015/03/24 02:10 | Watanuki, Yusuke v Sekiguchi, Shuichi | 1-6,3-6 |
| ITF Tunisia F5 | 2015/02/05 10:20 | Watanuki, Yusuke v Tepavac, Marko | 3-6,0-6 |
| ITF Tunisia F5 | 2015/02/03 08:30 | Watanuki, Yusuke v Licciardi, Pietro | 6-3,6-7,6-2 |
| ITF Tunisia F5 | 2015/01/30 10:30 | Watanuki, Yusuke v Pulgar-Garcia, Jaime | 2-6,4-6 |
| ITF Tunisia F5 | 2015/01/29 12:00 | Watanuki, Yusuke v Basso, Andrea | 7-6,6-3 |
| ITF Japan F6 Qual | 2015/06/08 01:00 | Makoto Ochi v Renta Tokuda | 6-7,6-1,4-6 |
| ITF Japan F6 Qual | 2015/06/07 03:30 | Fujii, Shinta v Renta Tokuda | 3-6,2-6 |
| ITF Japan F7 | 2014/06/19 03:05 | Kibi, Yuya v Renta Tokuda | 7-5,6-4 |
| ITF Japan F7 Qual | 2014/06/16 01:00 | Osafune, Masaki v Renta Tokuda | 4-6,3-6 |
| ITF Japan F7 Qual | 2014/06/14 00:30 | Yudate, Yuki v Renta Tokuda | 6-7,2-6 |
| ITF Japan F6 | 2014/06/11 07:10 | Renta Tokuda v Watanuki, Yusuke | 2-6,2-6 |