Dragon Ball Z follows the adventures of Goku who, along with his companions, defend the Earth against villains ranging from conquerors (Vegeta, Frieza), androids (Cell) and other creatures such as (Majin Buu). While the original Dragon Ball anime followed Goku from childhood to early adulthood, Dragon Ball Z is a continuation of his adult life, but at the same time parallels the lives of his sons, Gohan and Goten, as well as the development of his rivals Piccolo and Vegeta from enemies to allies.
Due to the success of the anime in the United States, the manga chapters comprising its story were initially released by Viz Media under the title Dragon Ball Z. Additional works called animanga were released in Japan, which adapt the animation to manga form. Dragon Ball Z’s popularity has spawned numerous releases which have come to represent the majority of content in the Dragon Ball universe; including 17 movies and 148 video games, many of them being only released in Japan, and a host of soundtracks stemming from this material. Dragon Ball Z remains a cultural icon through numerous adaptations, including a more-recent remastered broadcast titled Dragon Ball Kai. There have also been two sequel series; Dragon Ball GT (1996–1997) and Dragon Ball Super (2015–2018).