| Australian Open | 11/19 03:40 | 5 |
Rasmus Gemke
v
Koki Watanabe 
|
L | 2-0 | |
| Japan Masters | 11/12 06:50 | 5 |
Koki Watanabe v
Sfax Railways
|
L | 0-2 | |
| French Open | 10/24 18:00 | 3 |
Koki Watanabe v
Shi Feng Li
|
L | 1-2 | |
| French Open | 10/23 09:05 | 4 |
Koki Watanabe v
Jonatan Christie
|
W | 2-1 | |
| French Open | 10/22 09:50 | 5 |
Koki Watanabe v
Ayush Shetty
|
W | 2-0 | |
| Denmark Open | 10/15 12:55 | 5 |
Koki Watanabe v
Alex Lanier
|
L | 0-2 | |
| Arctic Open | 10/10 14:10 | 3 |
Kunlavut Vitidsarn
v
Koki Watanabe
|
L | 2-0 | |
| Arctic Open | 10/09 12:45 | 4 |
Elizabeth Mandlik
v
Koki Watanabe
|
W | 0-2 | |
| Arctic Open | 10/08 07:30 | 5 |
Kiran George
v
Koki Watanabe
|
- | Retired | |
| Korea Open | 09/25 08:55 | 4 |
Koki Watanabe v
Hong Yang Weng
|
L | 1-2 | |
| Korea Open | 09/24 03:30 | 5 |
Jia Heng Jason Teh
v
Koki Watanabe
|
W | 0-2 | |
| China Masters | 09/16 03:15 | 5 |
Guang Zu Lu
v
Koki Watanabe
|
L | 2-0 | |
| Hong Kong Open | 09/11 12:45 | 4 |
Koki Watanabe v
Shi Feng Li
|
L | 0-2 | |
| Hong Kong Open | 09/10 02:50 | 5 |
Ka Long Angus Ng
v
Koki Watanabe
|
W | 1-2 | |
| World Championships | 08/26 10:20 | 6 |
Koki Watanabe v
Ade Resky Dwicahyo
|
L | 0-2 | |
| China Open | 07/22 03:30 | 5 |
H.S. Prannoy
v
Koki Watanabe
|
L | 2-1 | |
| Japan Open | 07/19 06:20 | 2 |
Koki Watanabe v
TJ Druzstevnik Velky Hores
|
L | 0-2 | |
| Japan Open | 07/18 03:10 | 3 |
Hong Yang Weng
v
Koki Watanabe
|
W | 1-2 | |
| Japan Open | 07/17 00:50 | 4 |
Tien Chen Chou
v
Koki Watanabe
|
W | 1-2 | |
| Japan Open | 07/15 04:00 | 5 |
Koki Watanabe v
Nhat Nguyen
|
W | 2-0 | |
| Indonesia Open | 06/03 06:25 | 5 |
Cheuk Yiu Lee
v
Koki Watanabe
|
L | 2-1 | |
| Singapore Open | 05/28 05:15 | 5 |
Koki Watanabe v
Shi Feng Li
|
L | 0-2 | |
| Sudirman Cup | 05/02 02:20 | - |
Koki Watanabe v
Tien Chen Chou
|
W | 2-1 | |
| Sudirman Cup | 04/29 01:50 | - |
Koki Watanabe v
Enogat Roy
|
W | 2-1 | |
| Asia Championships | 04/09 08:20 | 5 |
Koki Watanabe v
Jonatan Christie
|
L | 1-2 | |
| India Open | 01/14 06:55 | 5 |
Koki Watanabe v
Cheuk Yiu Lee
|
L | 0-2 | |
| Malaysia Open | 01/09 08:50 | 4 |
Koki Watanabe v
Anders Antonsen
|
L | 1-2 | |
| Malaysia Open | 01/08 05:00 | 5 |
Kean Yew Loh
v
Koki Watanabe
|
W | 0-2 | |
| China Masters | 11/20 09:35 | 7 |
Koki Watanabe v
Viktor Axelsen
|
L | 1-2 | |
| Kumamoto Masters | 11/14 04:25 | 4 |
Vatanspor
v
Koki Watanabe
|
L | 2-1 |