The Ultra Series (ウルトラシリーズ Urutora Shirīzu?) is the collective name for all the shows produced by Tsuburaya Productions featuring Ultraman, his many brethren, and the myriad Ultra Monsters. The Ultra Series is one of the prominent tokusatsu superhero genre productions from Japan, along with Toei produced series Kamen Rider, Super Sentai, and the Metal Heroes. The Ultra franchise is also one of the most well known examples of the daikaiju genre, which also includes Toho's Godzilla films, and Daiei Film's Gamera series. However, the Ultra Series also falls into the kyodai (Giant Hero) sub-genre of Tokusatsu shows.