| Singapore Open XD | 06/09 09:25 | 3 | Feng/Huang v Watanabe/Higashino | W | 1-2 | |
| Singapore Open XD | 06/08 10:10 | 4 | Rivaldy/Mentari v Watanabe/Higashino | W | 1-2 | |
| Singapore Open XD | 06/07 03:30 | 5 | Ko S H / Eom H W v Watanabe/Higashino | W | 0-2 | |
| Sudirman Cup XD | 05/17 09:00 | - | Watanabe/Higashino v Kim/Jeong | L | 1-2 | |
| Sudirman Cup XD | 05/15 09:00 | - | Watanabe/Higashino v Gicquel/Delrue | L | 0-2 | |
| Open d'Angleterre - Double Mixtes | 03/16 14:55 | 4 | Kim/Jeong v Watanabe/Higashino | - | home | |
| Open d'Angleterre - Double Mixtes | 03/15 12:00 | 5 | Tang/Tse v Watanabe/Higashino | W | 0-2 | |
| Open d'Allemagne - Doubles Mixtes | 03/09 12:00 | 4 | Watanabe/Higashino v Kim/Jeong | L | 0-2 | |
| Open d'Allemagne - Doubles Mixtes | 03/07 16:00 | 5 | Watanabe/Higashino v Hyun Ko/Eom | W | 2-1 | |
| Open d'Inde - Doubles Mixtes | 01/22 06:30 | 1 | Watanabe/Higashino v Wang / Huang | - | Walkover | |
| Open d'Inde - Doubles Mixtes | 01/21 07:10 | 2 | Zheng/Huang v Watanabe/Higashino | W | 1-2 | |
| Open d'Inde - Doubles Mixtes | 01/20 06:50 | 3 | Watanabe/Higashino v Seo/Chae | W | 2-0 | |
| Open d'Inde - Doubles Mixtes | 01/19 06:50 | 4 | Watanabe/Higashino v Kaneko/Matsutomo | W | 2-0 | |
| Open d'Inde - Doubles Mixtes | 01/18 09:30 | 5 | Watanabe Y / Higashino A v Hee/Tan | W | 2-0 | |
| Open de Malaisie - Doubles Mixtes | 01/15 05:00 | 1 | Zheng/Huang v Watanabe/Higashino | L | 2-0 | |
| Open de Malaisie - Doubles Mixtes | 01/14 04:00 | 2 | Watanabe/Higashino v Puavaranukroh/Taerattanachai | W | 2-0 | |
| Open de Malaisie - Doubles Mixtes | 01/13 01:20 | 3 | Seo/Chae v Watanabe/Higashino | W | 0-2 | |
| Open de Malaisie - Doubles Mixtes | 01/12 02:50 | 4 | Kaneko/Matsutomo v Watanabe/Higashino | W | 0-2 | |
| Open de Malaisie - Doubles Mixtes | 01/11 02:50 | 5 | Mairs G / Moore J v Watanabe/Higashino | W | 0-2 | |
| Denmark Open XD | 10/21 10:20 | 3 | Goh/Lai v Watanabe/Higashino | L | 2-0 | |
| Denmark Open XD | 10/20 08:40 | - | Ishaan Bhatnagar/Tanisha Crasto v Watanabe/Higashino | W | 0-2 | |
| Denmark Open XD | 10/19 14:20 | 5 | van Der Lecq T / Jille D v Watanabe/Higashino | W | 0-2 | |
| Denmark Open XD | 10/19 10:20 | 5 | Hoo/Toh v Watanabe/Higashino | - | Cancelled | |
| Japan Open XD | 09/04 02:50 | 1 | Watanabe/Higashino v Puavaranukroh/Taerattanachai | L | 1-2 | |
| Japan Open XD | 09/03 02:00 | 2 | Zheng/Huang v Watanabe/Higashino | W | 1-2 | |
| Japan Open XD | 09/02 02:40 | 3 | Watanabe/Higashino v Tang/Tse | W | 2-0 | |
| Japan Open XD | 09/01 03:50 | - | Watanabe/Higashino v Goh/Lai | W | 2-0 | |
| Japan Open XD | 08/31 03:40 | - | Watanabe/Higashino v Elgamal/Hany | W | 2-0 | |
| World Championships XD | 08/28 07:20 | 1 | Zheng/Huang v Watanabe/Higashino | L | 2-0 | |
| World Championships XD | 08/27 03:00 | 2 | Watanabe/Higashino v Lamsfuss/Lohau | W | 2-0 |