Here's something I find hilariously ironic. According to that website I linked, all instances of "Incubus" were actually "Devil" in the PC version of this game. It's possible "Devil" could have been mistranslated to "Incubus", but if it was censored because of NOA's policies on religious references (consider that Volcano God was also changed to Volcano Giant), then the censors must not have known what an Incubus is, because I can't imagine they would have allowed that either if they did. (Not to mention the game also has a Succubus Queen boss enemy.) 

Then again, they allowed "Dung Beetle", and yeah I know that's a real type of insect, but it's still funny they'd allow "dung" knowing what it means.