| Australian Open | 11/18 06:00 | 3 | Koki Watanabe v Kodai Naraoka | L | 1-2 | |
| Australian Open | 11/17 03:00 | 4 | Koki Watanabe v Kenta Nishimoto | W | 2-0 | |
| Australian Open | 11/16 02:40 | 5 | Koki Watanabe v Sitthikom Thammasin | W | 2-0 | |
| Indonesia Masters | 10/20 09:00 | 4 | Jun Hao Leong v Koki Watanabe | L | 2-1 | |
| Indonesia Masters | 10/19 10:00 | 5 | Donghun Kim v Koki Watanabe | W | 0-2 | |
| Taipei Open | 07/21 07:20 | - | Koki Watanabe v Joo Ven Soong | L | 0-2 | |
| Taipei Open | 07/20 01:50 | 5 | Koki Watanabe v Yu Hsien Lin | W | 2-0 | |
| Singapore Open | 07/14 05:20 | - | Shi Feng Li v Koki Watanabe | L | 2-0 | |
| Singapore Open | 07/13 08:25 | 5 | Hans-Kristian Vittinghus v Koki Watanabe | W | 1-2 | |
| Malaysia Masters | 07/06 07:50 | 5 | Koki Watanabe v Kento Momota | L | 0-2 | |
| Thailand Open | 05/19 11:20 | 4 | Daren Liew v Koki Watanabe | L | 2-1 | |
| Thailand Open | 05/18 10:00 | 5 | Mads Christophersen v Koki Watanabe | W | 0-2 | |
| Asia Championships | 04/28 02:00 | 4 | Kean Yew Loh v Koki Watanabe | L | 2-0 | |
| Asia Championships | 04/27 05:40 | 5 | Dmitriy Panarin v Koki Watanabe | W | 0-2 | |
| Coreea - Open | 04/06 03:30 | 5 | Koki Watanabe v Kunlavut Vitidsarn | L | 0-2 | |
| Swiss Open | 03/23 11:10 | - | Koki Watanabe v Christo Popov | L | 1-2 | |
| Campionatul Mondial | 12/14 12:20 | 6 | Jun Peng Zhao v Koki Watanabe | L | 2-0 | |
| Campionatul Mondial | 12/12 10:50 | 6 | Anuoluwapo Juwon Opeyori v Koki Watanabe | W | 0-2 | |
| Indonesia Open | 11/24 07:00 | - | Koki Watanabe v Viktor Axelsen | L | 0-2 | |
| Indonesia Masters | 11/18 02:00 | 5 | Ka Long Angus NG v Koki Watanabe | L | 2-0 | |
| Indonesia Masters | 11/16 09:50 | 5 | Koki Watanabe v Kantaphon Wangcharoen | W | 2-0 | |
| Hylo Open | 11/03 11:00 | - | Koki Watanabe v Srikanth Kidambi | L | 0-2 | |
| All England Open | 03/17 17:00 | 5 | Koki Watanabe v Viktor Axelsen | L | 1-2 | |
| Asia Team Championships | 02/12 09:00 | - | Koki Watanabe v Kunlavut Vitidsarn | L | 1-2 | |
| Thailand Masters | 01/23 13:45 | 4 | Koki Watanabe v Shesar Hiren Rhustavito | L | 0-2 | |
| Thailand Masters | 01/22 06:00 | 5 | Koki Watanabe v Fei Xiang Sun | W | 2-1 | |
| Indonesia Masters - Calificari | 01/14 08:38 | - | Koki Watanabe v Jun Peng Zhao | L | 0-1 | |
| Indonesia Masters - Calificari | 01/14 04:00 | - | Toby Penty v Koki Watanabe | W | 0-2 | |
| Malaysia Masters | 01/08 07:30 | 5 | Koki Watanabe v Ka Long Angus NG | L | 1-2 | |
| Malaysia Masters - Calificari | 01/07 06:35 | - | Joo Ven Soong v Koki Watanabe | W | 1-2 |