Toonzai was a group of cartoons broadcast on Saturday morning on The CW. It was first broadcast on August 14, 2010. It used to be named The CW4Kids. The programs were broadcast on weekday afternoons.

The block is programmed by 4Kids Entertainment. They also programmed the 4Kids TV on Fox until December 2008. 4Kids also indicated that it will retain Yu-Gi-Oh! and Sonic X in its lineup, along with adding Dragon Ball Z Kai, a redone version of Dragon Ball Z from Funimation Entertainment that is shared with Nicktoons.