Nihon SF Taikai

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The Nihon SF Taikai (日本SF大会, Japan SF Convention) is an annual science fiction convention held in Japan. Each of these conventions is officially the Nth Nihon SF Taikai (第N回日本SF大会), but they are more popularly known by the official nicknames given to them based on their locations, e.g. TOKON (when it is held in Tokyo) or DAICON (when it is held in Osaka).

Each year the Nihon SF Taikai attracts between 1,000 and 1,500 science fiction fans. Events at the convention include panel discussions, lectures, readings, screenings, parties, games, concerts, and a dealing room for the sale of rare books, magazines, and other items related to science fiction.

A number of prizes are awarded at the convention, most notably the Seiun Award for the best science fiction of the year as voted by attendees of the convention.

Outside Japan, the Nihon SF Taikai is most famous for the animation for the opening ceremonies of Daicon III and IV Opening Animations, which was produced by the animators that later became Gainax. The DAICON IV opening video features a girl in a Playboy Bunny suit with cameos from many science fiction films and stories.