It doesnt work for website names, thats why people register before companies, so they resell to them with a high cost.
I remember reading a very amusing story about the frustration Warner Bros films felt way back in the 90s when "thematrix.com" was already registered by a mathematician so the official website for the movie series had to settle for something stupid like "whatisthematrix.com" lol. Think the mathematician might have eventually sold to them though, or maybe the trademark laws have changed.
It might be different for made-up words like "Castlevania" but even then it'd probably be a case of the trademark laws for Japan, whatever country the site is hosted on and whatever country the person who owns the site lives in. So probably too much of a hassle for Konami to want to bother with, since sadly they don't seem to care much about Castlevania or any of their franchises these days.