Castlevania originally launched on Nintendo's Famicom/NES ecosystem and soon inspired an MSX2 counterpart, Vampire Killer; both releases established musical themes that would define Konami's franchise and influence later re-releases on modern platforms such as the Nintendo Switch and the Nintendo eShop.
In a new video interview conducted by Castlevania-focused YouTuber Dongled to mark the series' 40th anniversary, Yamashita clarified which pieces she personally handled and how the MSX2 versions were produced.
She explained that she worked on inputting and adapting music data specifically for the MSX2, and that she believes she completed many of the musical conversions for Vampire Killer.
Yamashita also noted that, aside from arrangements, the MSX2 release features a different ending theme from the NES game.
The interview also seeks to correct long-standing misunderstandings about the original Castlevania sound team.
Yamashita told Dongled that Hidenori Maezawa was not involved in the original NES soundtrack, and that while Iku Mizutani may have assisted with sound programming or other tasks, she could not definitively confirm his role.
She added that the identity of the original sound programmer remains unclear but that Shinya Sakamoto is likely to have been involved, reflecting the limits of available records from Konami's mid-1980s development era.
Yamashita reflected on the public recognition of her work, saying she feels fortunate to receive sustained messages from fans but also has mixed emotions about how widely her involvement became known.
She recalled that when she first listed her credits on a personal website decades ago, she did not anticipate Akumajō Dracula growing into a long-running series, and that sharing those credits arguably helped ensure she would be remembered.
The interview is part of an ongoing effort to document the development histories of classic Konami titles.
For fans and historians, Yamashita’s account provides rare primary-source detail about the technical and creative processes behind the original Castlevania score, and helps clear up inaccurate attributions that have circulated in databases and retrospectives.
Many of these early Konami titles, including multiple Castlevania entries, continue to reach new audiences through digital releases like the Castlevania Anniversary Collection on Nintendo Switch and the NES library available via Nintendo Switch Online.