Ultraman, also known as the Ultra Series, is the collective name for all media produced by Tsuburaya Productions featuring Ultraman, his many brethren, and the myriad Ultra Monsters. Debuting with Ultra Q and then Ultraman in 1966, the Ultra Series is one of the most prominent tokusatsu superhero genre productions from Japan, along with the Toei-produced series Kamen Rider, Super Sentai and the Metal Heroes. The Ultra Series is also one of the most well-known examples of the daikaijū (giant monster) genre, along with Toho's[a] Godzilla series and Daiei Film's Gamera series. However, the Ultra Series also falls into the kyodai hīrō (giant hero) subgenre of tokusatsu TV shows, a subgenre it also helped popularise.