Dragon Ball Z is a Japanese animated television series based on the Dragon Ball franchise by Akira Toriyama and produced by Toei Animation. The series follows the anime Dragon Ball and adapts the last twenty-six volumes of the manga, published from 1988 to 1995.
Dragon Ball Z takes place five years after the marriage of Son Goku and Chichi, now parents of Son Gohan. Raditz, a mysterious alien warrior, who turns out to be Son Goku's brother, arrives on Earth to find Son Goku. Son Goku learns that he comes from a planet of fearsome warriors of which only four remain, and that he was sent to Earth in order to conquer it (a fall as a child would have made him lose his memory).