The Daicon III and IV Opening Animations are two short, anime, 8 mm films that were produced for the 1981 Daicon III and 1983 Daicon IV Nihon SF Taikai conventions. They were produced by a group of amateur animators known as Daicon Film, who would later go on to form the animation studio Gainax. The films are known for their unusually high production values for amateur works and for including numerous references to otaku culture, as well as its unauthorized appropriations of the Playboy Bunny costume and the 1981 songs "Twilight" and "Hold on Tight" by English rock band Electric Light Orchestra.
