[quote=Pachamac]
You're overgeneralising the popularity of these things which is missing the/Innue's point. There is a great audience and demand regardless of whatever its popularity is in the mainstream because that's what a lot of people who are rping are interested in. Also, superheroes are indeed a lot more narrow in genre for rps... it's an rp about superheroes. Whereas anime inspired rps , but can instead be based and influenced on anime/japanese video game tropes, of which there's a great many deal of things. You can extend that to literally anything you wanted, from slice of life highschool rps, to fantasy, scifi, whatever have you. Superhero rps on the other hand just tend to be... comic book influenced tropes which are again comparitively more niche and are based only around superheroes.This is why there's more 'anime focused rps', because the possibility of what someone could do with them is simply that much greater in comparison.
[/quote]

It might be different for RPs specifically. I do admit I don't invest a large amount of time scanning interest checks, so I don't passively know the extent of popular theme's at the time (nor did I ever pay attention to such a thing even during my 20k+ posts RP days).

Superheroes by bare minimum just require you have a power or ability, outside of that you can do almost anything with the RP. And it is true that you can have RP's based on Japan culture, but most anime RP's I've seen were fandom ones, not ones that went "Let's make a unique anime like RP". Unless if you count any RP people use an anime pic for appearance in the CS to be an anime RP, in that case almost every RP is an anime RP though.