IANAJL - I Am Not A Japanese Lawyer
But the way I can best understand Japanese porn laws is:
Porn produced in Japan
can not be sold inside Japan or marketed to Japanese buyers if it's
uncensored
Porn produced in Japan however can be sold overseas uncensored ONLY if the recording is not also available in Japan in any version.
That's why Labels like SkyBlue and Red Hot can produce uncensored JAV in Japan for overseas audiences -
But only as long as NO versions at all of the same video (even uncensored) are available in japan.
That would explain why Studio Leaks are a big scandal in Japan - It would mean the censored version being sold in Japan has to removed from the market. I've noticed a lot of JAV titles that were reported in the press as leaked uncensored in China/Taiwan are no longer available on DMM. (which kind of confirms it)
As for Yuahentai - she hasn't been arrested and will probably be safe as long as her porn isn't marketed/sold inside Japan.
As for Korean Porn laws - any nudity at all is illegal to sell in Korea - BUT if it's sold on a overseas website, that's a loophole Korean thots can use to get around being prosecuted. Onlyfans is not available in Korea for example (
unless you use a VPN)
Taiwan porn laws are just like the West
PRC China porn laws are pretty severe - meaning jail for anyone caught making it or even possessing it - which is why all Mainland Chinese porn is underground and run by dodgy wechat accounts