Japanese players hate mods/addons in general, like really really much. The only addon that seems to be widespread tolerated under the JP playerbase are shader tools.

Only reason i can think of why that is is cause they feel like it's disrespectful to the work of the devs and that it devalues the game, which asian players are really crazy about. They are really into status symbols like limited public (not fully instanced, like a own zone for every player) housing and the ultimate weapons and all that.

So i feel like this whole mess has come down now to a kind of cultural clash between JP and the western world which are much more liberal about the use of third party tools. Question is if SE sticks with their JP playerbase even tho it is by now significantly smaller than the NA/EU playerbase or if they cut western players finally some slack.