wmfewmgkqoozlnzmnn I am not an expert, but my understanding is that studios that release uncensored content are either not based in Japan, and/or are not releasing content in Japan.
Basically - they are shooting and releasing content specifically for release outside of the Japanese market, and if they tried to release censored content in Japan along with the uncensored versions outside of Japan, it would lead to a long list of legal and industry issues.
Plus there's arguments to be made about the quality/castings/etc. of non-censored JAV vs JAV released inside Japan since they're really two difference industries, but I'll save that for another time.