False. Mastodon blocks those CSAM instances (speccially the Japanese ones) in masse. It's the opposite of you say. Twitter and FB have a harder problem on that because they are single-net based.
What do you mean by "specifically the Japanse ones"? Is CSAM more prevalent there or is something along the lines of having more loli content posted there which fals under child pornography laws in certain countries?
Pavoo. It didn't have art related CSAM, which in the end there are just drawings, but real people CSAM. Not porn, just top nudes which in Japan they have an ambiguous stance. Thus, blocking pavoo.net on every Mastodon instance was almost mandatory to keep your sanity in good levels.
On Japan and nudity, I know some of it it's being used not as sexualization, but as a hard prank (Takeshi's Castle, hidden camera pranks on toilets with falling walls, nudity jokes at Doraemon/Crayon Shin Chan, Dragon Ball and Bulma...), but for sure in this case didn't have an intention to ridicule anyone.
Akibahara had a mall where on a single flat there were magazines were displaying illegal nudity as if they were used as a sports magazine or something like that. Creepy stuff. It seems the Japanese people are sexually represend in their teens so they can hyperfocus at school over anything else but then this creates "sexually disabled" adults with lots of troubles on relationships and a hard lack of teenage discoveries.
