when did one piece air on cartoon network
April 2005.
One Piece
It premiered in the United States on September 18, 2004, in first-run syndication on the Fox network as part of the weekend programming block FoxBox TV, and later aired on Cartoon Network on their Saturday night action programming block, Toonami in April 2005.
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One Piece [SEP] Anime series
4Kids contracted Viz Media to handle home video distribution. 4Kids' in-house musicians wrote a new background score and theme song nicknamed "Pirate Rap". 4Kids' dub mandated edits for content and length, which reduced the first 143 episodes into 104. Initially, 4Kids originally created an English version of the first opening theme, "We Are!" It premiered in the United States on September 18, 2004, in first-run syndication on the Fox network as part of the weekend programming block FoxBox TV, and later aired on Cartoon Network on their Saturday night action programming block, Toonami in April 2005. It also aired in other blocks and lineups, such as its Monday-Thursday night prime-time lineup and its "Miguzi" weekday after-school action block in 2006.