The only thing I can think of that even remotely applies is royal road progression, like @Forest was referring to, but that’s honestly used just as much in J-Pop so it’s not exclusive to visual kei or anything. That’s why I said above that people insist visual kei is some special movement that can’t be replicated, but can’t distill the essence of what is so special. I’ve been dealing with this for two decades, even tried answering it myself multiple times, but there really isn’t any one thing that’s so special. It’s changed far too much over my entire time here to really say!
I’ll die on this hill, but kotekote was more distinct and more unique than any of the metal bands this scene has to offer. We have an entire topic where we find riffs from visual bands that were lifted from non-visual bands, with the not-so-subtle implication being that these visual artists that we like to listen to are heavily influenced by metal bands we largely ignore. You know what’s largely missing from that topic? Trick question, the answer is nothing! Visual kei bands lift melodies and find inspiration from a variety of artists, genres, and scenes. You’ll find comparisons to Iggy Pop, Finntroll, Nirvana, Donny Hathaway, even the Backstreet Boys! And that’s barely mentioning all the melodic references to domestic acts we aren’t aware of.
But you know what I can’t find? An international equivalent to kotekote.