You said that and I quote "Apart from Thailand, I don't think BP in other Asian countries is more popular than SNSD".
You never mentioned that it has to be countries that were not into kpop until recently. And to be frank, Asia isn't just 3 countries. It consists of 48 countries.
Excluding them is like me excluding Korea, China and Japan when saying which group is the most popular when talking about Asian countries because they have been in the Korean wave from the beginning.
fyi(Thailand wasn't in the Korean wave in the beginning)