Dragon Ball Z Kai is an anime series revised from the Dragon Ball Z series. It's based on the manga series by Akira Toriyama. The series premiered on Fuji TV in Japan on April 5, 2009, with the episodes remastered for HDTV, featuring updated opening and ending sequences, and a rerecording of the vocal tracks by most of the original cast. The footage was also re-edited to more closely follow the manga, resulting in a faster-moving story, and damaged frames removed. As such, it is a new version of Dragon Ball Z created from the original footage.
Dragon Ball Z-Kai is licensed by FUNimation Entertainment for an English-language release in the U.S., under the title Dragon Ball Z Kai. The series was broadcast on Nicktoons from May 24, 2010 to January 1, 2012. In addition to Nicktoons, the series also began airing on The CW's Saturday-morning programming block, Toonzai, on August 14, 2010 and continues to air on Toonzai's successor, Vortexx, which began on August 25, 2012. In addition to the TV airings, FUNimation has also released bilingual Region 1 DVD and Blu-ray box sets of Dragon Ball Z Kai. These box sets contain the original Japanese audio track with English subtitles, as well as the uncut version of the English dub, which does not contain any of the edits made for the TV airings.
On November 5, 2012, Mayumi Tanaka, the Japanese voice actor of Kuririn, announced that she and the rest of the cast are recording more episodes of Dragon Ball Z Kai. She noted that the show will not be aired in Japan, but will be continuing overseas.