Round: 27 Ground: Hardcourt outdoor
| ITF Japan F7 MD | 2016/06/09 05:55 | Nagao/Oku v Watanuki/Watanuki | 6-2,3-6,8-10 |
| ITF Japan F7 MD | 2017/06/06 09:10 | Nagao/Oku v Sekiguchi/Suzuki | 6-3,6-4 |
| ITF Japan F6 MD | 2017/05/30 07:40 | Fukuda/Onozawa v Nagao/Oku | 6-2,7-5 |
| ITF Singapore F1 MD | 2017/05/27 11:05 | Ehara/Katayama v Nagao/Oku | 7-6,6-2 |
| ITF Singapore F1 MD | 2017/05/27 07:50 | Moritani/Takeuchi v Nagao/Oku | 6-7,6-1,8-10 |
| ITF Singapore F1 MD | 2017/05/23 06:25 | Hung/Yu v Nagao/Oku | 4-6,3-6 |
| ITF Japan F5 MD | 2017/04/08 12:40 | Imai/Niki v Nagao/Oku | 6-4,6-4 |
| ITF Japan F5 MD | 2017/04/07 07:50 | Uesugi/Watanuki v Nagao/Oku | 3-6,6-2,5-10 |
| ITF Japan F5 MD | 2017/04/06 05:35 | Onoda/Shiga v Nagao/Oku | 3-6,3-6 |
| 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 |
| Challenger Toyota MD | 2016/11/14 05:30 | Watanuki/Watanuki v Ratiwatana/Yi | 3-6,4-6 |
| Challenger Kobe - MP | 2016/11/10 05:00 | Masur/Pavic v Watanuki/Watanuki | 2-6,6-3,10-5 |