サンテレビジョン
"The Big O" aired on Wowow satellite television from October 13, 1999, and January 19, 2000. The English-language version premiered on Cartoon Network's Toonami on April 2, 2001, and ended on April 23, 2001. Originally planned as a 26-episode series, low viewership in Japan reduced production to the first 13. Positive international reception resulted in a second season consisting of the remaining 13 episodes; co-produced by Cartoon Network, Sunrise, and Bandai Visual. Season two premiered on Japan's Sun Television on January 2, 2003, and the American premiere took place seven months later. Following the closure of Bandai Entertainment by parent company Bandai (owned by Bandai Namco Holdings) in 2012, Sunrise announced at Otakon 2013 that Sentai Filmworks acquired both seasons of "The Big O".