Round: 27 Ground: Hardcourt outdoor
| ITF Japan F3 MD | 2017/03/20 07:20 | Watanuki/Watanuki v Moritani/Shiga | 6-3,6-3 |
| Challenger Toyota MD | 2016/11/14 05:30 | Watanuki/Watanuki v Ratiwatana/Yi | 3-6,4-6 |
| Challenger Kobe - Herrdubbel | 2016/11/10 05:00 | Masur/Pavic v Watanuki/Watanuki | 2-6,6-3,10-5 |
| Challenger Kobe - Herrdubbel | 2016/11/07 06:10 | Watanuki/Watanuki v Peng/Uchiyama | 2-6,6-3,11-9 |
| ITF Japan F7 MD | 2016/06/11 06:30 | Watanuki/Watanuki v Moritani/Okamura | 6-3,6-4 |
| ITF Japan F7 MD | 2016/06/10 05:40 | Watanuki/Watanuki v Han/Uesugi | 3-6,7-6,10-6 |
| ITF Japan F7 MD | 2016/06/09 05:55 | Nagao/Oku v Watanuki/Watanuki | 6-2,3-6,8-10 |
| ITF Japan F3 MD | 2017/03/20 05:20 | Ehara/Niki v Trong'kul/Wach'ong | 6-4,6-4 |