Oct. 5, 1975 - Feb. 27, 1977
The Fleed-a planet belonging to nebula of Vega two million light-years away from earth-is destroyed through a fierce attack by the allied forces of Vega. However, the prince of the Fleed narrowly escapes the hot pursit of the Vega troops and flees from the planet in his own craft-the Grendizer.
After ten years’ travel through space he reaches the earth, and comes to know Dr. Umon, a space scientist. The prince names himself Daisuke Umon, and leads a peaceful life as a member of the Umon Family.
In the meantime, Vega the Great, whose ambition knows no limits now that he has conquered all the planets in the nebula of Vega, intends to invade our galactic system. He starts his offensive with the earth. Daisuke, Dr. Umon, and his assistant, Koji set themselves against the devils to protect humanity. In this story we see Grendizer acting bravely to encounter the UFO monsters.
(C)GO NAGAI/DYNAMIC PLANNING INC., TOEI ANIMATION CO., LTD.