Also, technically "demon" and "devil" are two completely different words. A devil is a malicious slanderer or foe, whereas a demon is a spirit or lesser god. Seeing as how Dracula wasn't actually up to any real no-good and the castle is indeed populated by spirits, Demon Castle is the better name. The problem is Japanese took from "modern" English, which erased any distinction between demons and devils. So even in the Japanese language you'll see "akuma" used interchangeably. However, they are distinct terms which have been bastardized by the Church over the years. However, the title is indeed AKU-ma, which implies not just a demon but an evil demon. In some sects of Buddhism that may be an important distinction, because a spirit which causes suffering isn't necessarily evil ("onma"). And technically Satan in the modern passivist (huh, thought that was a real word... well it is now!) sense as the tempter would be a "bonnohma". In the strictest literal sense, the closest thing to "akuma" would be Ahriman, the god of chaos in Zoroastrianism. Perhaps a better translation for "akumajou" would be Fiend Castle or Fiendish Castle or Castle of Fiends, but none of those have a nice ring to them.