The Daicon III and IV Opening Animations are two 8mm film anime short films that were produced for the 1981 Daicon III and 1983 Daicon IV Nihon SF Taikai conventions as a way to introduce the conventions and celebrate every character and vehicle and robot in pop culture at the time. They were produced by a group of amateur animators known as Daicon Film, who would later go on to form the animation studio Gainax. Notably Hideaki Anno who went on to create Neon Genesis Evangelion and direct such films as Shin Godzilla worked on both films The Daicon III and IV Opening Animations are also known for their unusually high production values for amateur works and for including numerous references to otaku culture, as well as the unauthorized appropriations of the Playboy Bunny costume.