@snow We as users can certainlu voice our opinions. The culture there in Japan is certainly different, there are things alloweed there that would be jail bait in a western country.
One of the main reasons instances were concerned about some of the Asian instances - and many blocked them wholesale, just to avoid having copies of those media files in their own servers (as normally, copies of images end up cached locally in many places because someone in that instance is following a remote user).
There is a good article I found the other day that you might enjoy reading - it explains some of this and the admins reactions to it, the culture in Japan.
https://medium.com/@EthanZ/mastodon-is-big-in-japan-the-reason-why-is-uncomfortable-684c036498e5