Yes, and Eom Hye Won, too. That suggests either that Ko Sung Hyun is the one injured or that Ko didn't feel it was worth his while travelling for just one event. Either that or they are just rethinking the bigger events. They are still entered in the next two Super 300 events. We shall see.
It's been a while since we seen Ko/Shin in action. I wonder if Ko's injury was pretty serious, he had been withdrawing and retiring for the past few months (only in international tournaments though).