Round: 29 Ground: Hardcourt outdoor
| ITF Japan F7 MD | 2017/06/09 05:00 | Watanuki/Watanuki v Imai/Onozawa | 6-2,6-4 |
| ITF Japan F7 MD | 2017/06/08 06:15 | Nagao/Oku v Watanuki/Watanuki | 7-6,4-6,8-10 |
| ITF Japan F7 MD | 2017/06/06 09:15 | Han/Kai v Watanuki/Watanuki | 5-7,6-3,4-10 |
| ITF Japan F6 MD | 2017/06/01 03:55 | Matsui/Rungkat v Watanuki/Watanuki | 6-4,6-2 |
| ITF Japan F6 MD | 2017/05/31 05:30 | Watanuki/Watanuki v Kikuchi/Takeshima | 6-4,6-7,10-6 |
| ITF Japan F6 MD | 2017/05/30 08:05 | Okamura/Takeuchi v Watanuki/Watanuki | 4-6,3-6 |
| ITF Japan F3 MD | 2017/03/23 05:30 | Watanuki/Watanuki v Ehara/Niki | 6-7,6-7 |
| ITF Japan F3 MD | 2017/03/20 07:20 | Watanuki/Watanuki v Moritani/Shiga | 6-3,6-3 |
| ITF Japan F7 MD | 2017/06/09 05:35 | Fukuda/Sasai v Kikuchi/Takeshima | 4-6,6-4,10-6 |
| ITF Japan F7 MD | 2017/06/07 05:15 | Castelnuovo/Nikles v Fukuda/Sasai | 4-6,4-6 |