Isn't Gyeon (from South Korea) one the best products? Maybe he used that? I know lots of places down here recommend it.
http://gyeonquartz.com/about-us/
Funny story though
Koreans have quite a unique culture. So much of the world thinks of "Asian culture". But one country to another can be is as distinct as France & Germany. Also they have dolsot bibimbap. Like a heathen I like to throw my Kimchi into it. So good. It's probably as culturally strange to them as it was once was when I was in London with some customers watching the Chinese tourists mixing up their muesli with bacon and eggs.