Bedrockgames
I post in the voice of Christopher Walken
I'm old, I don't keep up with pop culture over the past decade or so
But you're right. In recent years, Korea certainly has exploded in popularity with film in particular. I was speaking more of in the RPG context.
I think when people say east asian, they mean Korea, China or Japan. But if we are talking 70s through the 90s, I think you are right most people were thinking Japanese or Chinese (though if you go back a suprising number of those movies involve Tang Soo Do, Hapkido or Taekwondo).
But Korea is pretty popular. If you go on Netflix there are a ton of Korean dramas. I used to watch a lot of Chinese dramas and it was actually hard to find them on certain platforms because they were mixed in with the K dramas (and kind of overwhelmed by them). My wife is very into K Pop and that is a huge global phenomenon (seems to have some traction with geeks and nerds too). Taekwondo has been one of the more popular martial arts (and it is an olympic sport). I started out in taekwondo for that reason when I first got into martial arts.