Along with the blog post, she said in
this interview: "I'm certain that other people were involved with the composition of the original version of Castlevania, but they composed very little of the music". And "As far as I know, the music for Castlevania is the same on the Famicom Disk System and the MSX" "For the FDS and MSX titles, I actually made the sound data and served an engineering role". So the S. Terashima credit still applies.
In
her facebook she links to Vampire Killer and Voyager (arranges), mentions Wicked Child.
People take so seriouly the James Banana thing, but I'd say that's just a joke credit (like a supposed 'big hollywood composer') and in no way meant to be an alias, nobody from the staff is properly credited. If you check the
credits there is stuff like "Directed by Trans Fishers", "Screenplay by Vram Stoker" and the amazing cast, "Dracula: Christopher Bee"...