a mecha anime television series aired from 1980 to 1981. It ran for 50 episodes. It is also referred to as "God Sigma, Empire of Space" and "Space Combination God Sigma".Space Emperor God Sigma was created by Toei's Television Division, under the name "Saburo Yatsude" and produced by Academy Production (who subcontracted Greenbox). The series was produced by the main Toei company, and not by Toei Animation; Yoshinobu Nishizaki's Academy Productions provided production assistance. Toei Agency handled the advertising for the show, and its main sponsor was Hobby (now Bandai's Boy's Toys Division).

This anime was the last that Takashi Ijima would work on; he had been part of Toei's TV division's projects since Chōdenji Robo Combattler V, which aired in 1976. Joined by Katsuhiko Taguchi, the chief director, the two created an anime that lasted for four full seasons, which was rare at the time of its broadcast. Edit
The story is set in the year 2050 AD, and mankind has been steadily advancing its space technology. However, the planet is suddenly set upon by a mysterious enemy: the forces of Eldar, who came from 250 years in the future. In their time, 2300 AD, their planet Eldar was invaded by Earth, and soundly defeated by Earth's Trinity Energy, a mysterious energy used in their weaponry that possesses power many times that of a hydrogen bomb. The Eldar people's objective is to steal this Trinity Energy before it can be used against them.

The Eldar forces begin by taking over Jupiter's moon Io, one of the places humanity has immigrated to by then. After that, they begin to attack Trinity City with their legions of Cosmosauruses in order to steal the Trinity Energy. Toshiya and his friends use God Sigma to protect the planet and the Trinity Energy, and the battle evolves into a long war to retake Io.