Beyblade: Metal Fusion, known in Japan as Metal Fight Beyblade (メタルファイトベイブレード, Metaru Faito Beiburēdo), is a Japanese manga created by Takafumi Adachi, serialized in Shogakukan's monthly magazine CoroCoro Comic between September 2008 and February 2012. The series is a spin-off of the original Beyblade manga series written by Takao Aoki. The manga inspired an anime production, retroactively named Beyblade: Metal Saga, which encompasses four seasons: Metal Fusion, Metal Masters, Metal Fury and Shogun Steel. The anime was produced by Tatsunoko Pro and SynergySP. It premiered on TV Tokyo on April 5, 2009, and aired until December 23, 2012. Nelvana, which licensed and produced English adaptations of the original anime series, also localized the four seasons of Metal Saga.