I'm married to a Chinese woman, hang out with her Chinese friends, and have visited my Chinese inlaws in mainland China (Xuzhou, Beijing, Shanghai). My sister-in-law is easily the most ticklish woman in China, although I suppose I should tickle all the others just to make sure...
anyway, the Chinese keep their kinks a bit more under wraps than us wacky Westerners. You won't find strip clubs or anything like that, but in smaller, non-Western-tourist cities like Xuzhou the working girls have arrangements with hotel staff, who alert them if people check in. The girls then start calling your room on a nightly basis.
I didn't indulge, but I hear they're *much* cheaper than their Western counterparts.
the "scene" in Japan is... misdirected, is the best way I can put it. The Japanese on a whole seem to *really* be into all sorts of humiliating S&M/bondage stuff, and all of their tickling is focused on being another aspect of torture or a means to the end of making the girl pee. They like pee over there... a lot.
No idea about Korea. Maybe I'll bug my Korean gal pal about it next time we speak.