Round: 28 Ground: Clay
| ITF Japan F6 | 2015/06/09 04:00 | Watanuki, Yusuke v Renta Tokuda | 7-5,2-6,6-2 |
| ITF Japan F6 | 2014/06/11 07:10 | Renta Tokuda v Watanuki, Yusuke | 2-6,2-6 |
| ITF Japan F8 | 2016/06/17 03:40 | Sho Shimabukuro v Watanuki, Yusuke | 6-7,1-6 |
| ITF Japan F8 | 2016/06/16 03:20 | Yuta Shimizu v Watanuki, Yusuke | 3-6,6-3,4-6 |
| ITF Japan F7 | 2016/06/10 01:00 | Watanuki, Yusuke v King, Evan | 5-7,4-6 |
| ITF Japan F7 | 2016/06/09 01:00 | Watanuki, Yusuke v Tanuma, Ryota | 6-0,6-2 |
| ITF Japan F7 | 2016/06/06 04:40 | Watanuki, Yusuke v Takeshima, Shunrou | 7-5,6-4 |
| ITF Japan F5 | 2016/04/06 04:15 | Shiga, Masato v Watanuki, Yusuke | 7-6,6-4 |
| ITF Japan F1 | 2016/03/10 02:45 | Nagao, Katsuki v Watanuki, Yusuke | 1-6,6-2,1-6 |
| ITF Turkey F5 | 2016/02/03 08:00 | Gigounon, Germain v Watanuki, Yusuke | 6-1,4-6,6-4 |
| ITF Japan F8 | 2016/06/17 01:00 | Kaito Uesugi v Renta Tokuda | 6-3,5-7,2-6 |
| ITF Japan F8 | 2016/06/16 01:00 | Renta Tokuda v Niki, Takuto | 6-3,7-6 |
| ITF Japan F8 | 2016/06/14 04:25 | Renta Tokuda v Onishi, Ken | 6-0,7-5 |
| ITF Japan F7 Qual | 2016/06/05 01:00 | Renta Tokuda v Rio Noguchi | 4-6,2-6 |
| ITF Japan F6 | 2016/05/31 08:00 | Renta Tokuda v Baughman, Deiton | 3-6,3-6 |
| ITF Japan F6 Qual | 2016/05/29 01:00 | Renta Tokuda v Takeshima, Shunrou | 3-6,6-2,6-2 |
| ITF Japan F6 Qual | 2016/05/28 01:00 | Renta Tokuda v Tomohiro Masabayashi | 6-2,6-4 |
| ITF China F6 | 2016/05/13 02:00 | Renta Tokuda v Michael Geerts | 5-7,5-7 |