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.
The DAICON IV opening video features a girl in a Playboy Bunny suit with cameos from many science fiction films and stories.