| Malaysia Masters | 05/22 03:45 | 5 | Viktor Axelsen v Koki Watanabe | L | 2-0 | |
| Thailand Open | 05/16 04:25 | 4 | Koki Watanabe v Guang Zu Lu | L | 1-2 | |
| Thailand Open | 05/15 09:10 | 5 | Koki Watanabe v Yin Chak Chan | W | 2-1 | |
| Thomas Cup | 05/02 11:05 | - | Koki Watanabe v Jun Hao Leong | L | 0-2 | |
| Thomas Cup | 05/01 11:35 | - | Koki Watanabe v Chun-Yi Lin | W | 2-0 | |
| Thomas Cup | 04/29 10:45 | - | Koki Watanabe v Fabian Roth | W | 2-0 | |
| Thomas Cup | 04/28 01:55 | - | Koki Watanabe v Jiri Kral | W | 2-0 | |
| Asia Championships | 04/10 11:00 | 5 | Koki Watanabe v Cheuk Yiu Lee | L | 0-2 | |
| Swiss Open | 03/20 16:30 | 5 | Alex Lanier v Koki Watanabe | L | 2-1 | |
| All England Open | 03/15 12:35 | 3 | Koki Watanabe v Christo Popov | L | 0-2 | |
| All England Open | 03/14 10:55 | 4 | Toma Junior Popov v Koki Watanabe | W | 0-2 | |
| All England Open | 03/12 10:45 | 5 | Koki Watanabe v Tzu Wei Wang | W | 2-0 |