Hi Jillian. There is a concerning attack on free expression which might be of interest to you (and the EFF):
https://nichegamer.com/dlsite-temporarily-blocks-major-western-payment-processors/
The art / sexual expression (of non-existent) people should be compatible with the First Amendment (if that is relevant) and local law (including the local Japanese Constitution, Articles 19 / 21 of which contain a right to free expression).
Perhaps relevant:
https://qoto.org/@olives/112166752529068131
https://qoto.org/@olives/111888946356326887