So the question is: what range of films should this thread encompass?
It's pretty self-explanatory when films are produced in South Korea and feature a Korean cast, but what about co-productions?
There are films like "Dangerous Liaisons," a Chinese production directed by Hur Jin-ho and featuring Jang Dong-gun. Films like "The Last Stand" and "Stoker," directed by Kim Jee-woon and Park Chan-wook respectively, but featuring predominantly American casts. Then we have films like the 2021 Thai film "The Medium," which was written by Na Hong-jin and is described as "a Korean film exclusively in Thai." And the list goes on...

.