Perhaps I'm naive or not important enough to know about these things. In SEA the prostitution is in your face and even in SG they will stand streetsidr asking you to come in; but in East Asia it must all be behind closed doors I guess because I've just never been privy to that sort of thing.
I'm likely biased in my experiences because I'm not into those types of things personally, would never use a prostitute.
Sorry, but what do you mean with "East Asia"? China is East Asia, and this is very much a thing. So is Korea and Japan.
"Since Japanese law defines prostitution as "intercourse with an unspecified person in exchange for payment," most fūzoku offer only non-coital services, such as conversation, dancing, or bathing, to remain legal.[2] Nevertheless, polls by MiW and the National Women's Education Center of Japan have found that between 20% and 40% of Japanese men have paid for sex."
" Kabukicho, an entertainment and red-light district in Shinjuku, Tokyo, measures only 0.34 km2, and has approximately 3,500 sex parlors, strip theaters, peep shows, "soaplands", 'lovers' banks, porno shops, sex telephone clubs, karaoke bars and clubs, etc.[32] (...) It was reported in 2003 that as many as 150,000 non-Japanese women were then involved in prostitution in Japan."
If your stats are true that 20-40% of Japanese men have paid for sex than I am incredibly naive, however I dont believe the stats are that high
I've lived in Korea for many years, spent a lot of time in Japan, and do a lot of business in Hong Kong. Prostitution, particularly in room salon settings, is the primary setting for most intra-Asian business. Business drinking volumes are also off the charts, particularly in Korea.