Castlevania 64: Foreign Release Info
In Japan, Castlevania 64 is known as "Akumajou Dracula Mokushiroku". "Mokushiroku" means "apocalypse", but is also the Japanese name of the book of Revelations in the bible. Either can be applied. In Europe, it is known simply as Castlevania just like it is in America.
The only difference between the Japanese and American/European additions is that the Japanese version has a save game chip inside the cartridge, so it supports the rumble pak. The American version requires a controller pak to save games. Oddly enough, this is the first time that a Castlevania game appeared in America before Japan - a whole two months, to be precise.
Castlevania Games - Castlevania 64 - CV64 Foreign