Also known as "Steel Jeeg" or "El Vengador", Kotetsu Jeeg is another classic Humongous Mecha anime created by Go Nagai in cooperation with Tatsuya Yasuda and first released in 1975. Essentially a Combining Mecha series, it told the story of Shiiba Hiroshi, a car racer who's reconstructed as a cyborg by his father after being mortally wounded in an accident. As a cyborg, Hiroshi's capable of transforming into the eponymous Kotetsu Jeeg, a steel robot head that combines with a variety of external parts to form a giant robot and fight the minions of Queen Himika, leader of the Jamatai Kingdom.