Hunter × Hunter
Before the first anime television series was created, a short film adaptation of "Hunter × Hunter" was shown as part of the 1998 "Jump Super Anime Tour" alongside similar adaptations of "Seikimatsu Leader den Takeshi!" and "One Piece". Produced by Studio Pierrot and directed by Noriyuki Abe, it depicts the early events of the manga up to Gon's ocean voyage from Whale Island.
Vampire Hunter D (1985 film)
"Vampire Hunter D" is credited as one of the earliest anime productions targeted explicitly at the male teenager/adult demographic in lieu of family audiences, and capitalized on the emerging OVA market due to its violent content and influence from European horror mythology (such as the films of British film studio Hammer Productions). The film’s limited budget made its technical quality comparable to most anime television series and other OVAs, but not with most theatrical animated films.