I know little about Korea...but do they smoke a lot there?
“In South Korea, the current cigarette smoking rate among people aged over 15 years, based on 2016 estimates, was approximately 21.5% overall 37.9% for men and 5.6% for women.”
http://www.smokefreeworld.org/behind-numbers-smoking-south-korea/
My brother in-law and sister did missionary work there, they have a lot of friends there. I will find out.