Produced by Tsuburaya Productions, Ultraman Cosmos aired from July 7, 2001 to September 28, 2002, with a total of 65 episodes, which currently makes it the longest running Ultra show to date.

In June 2002, Cosmos was taken off of television for several weeks (following the broadcast of the 49th episode) when lead actor Taiyou Sugiura was questioned in an assault and extortion case.

[3] Observing the increasing trend of violence that occurred in the younger generation of Japan, Tsuburaya made an Ultraman character that has a gentler nature than its predecessors.

Thus, the concept of the story is the theme of pacifism, meaning an idea which considers war to be morally unjustifiable, and all disputes or disagreements must be resolved by the way of peace.

In it, 11-year-old Musashi Haruno encounters the being of light, Ultraman Cosmos (ウルトラマンコスモス, Urutoraman Kosumosu), and befriends him as the two confront a threat to Earth.