Kaijudo is an American animated series and trading card game that serve as a spin-off and relaunch of the Japanese Duel Masters franchise. The animated series was produced by Hasbro Studios, animated by Moi Animation in South Korea, and developed by Henry Gilroy and Andrew R. Robinson for Wizards of the Coast.

Previously, Hasbro Entertainment licensed and produced an English-language adaptation of the 2002 Duel Masters anime series with Plastic Cow Productions in 2004, as well as an American-exclusive second season, Duel Masters: Sacred Lands, with Elastic Media Corporation. Wizards of the Coast also launched the companion Duel Masters Trading Card Game in the United States in the same year; the series would eventually be discontinued in 2006.

Kaijudo premiered on the Hub Network, a joint venture between Hasbro and Discovery, on May 5, 2012 and ended on December 28, 2013. The companion trading card game was issued by Wizards of the Coast and first released on June 26, 2012. The franchise was discontinued in 2014, with the TV series cancelled after its second season.