Summer 1976 Anime

The world's peace is suddenly endangered by Mogool, a base located at the bottom of the sea. Helqeen, the tyrannical ruler of the Mogoolian Empire, seeks to conquer Earth alongside her loyal followers Goroskie and Zan-gack. To thwart her ambitions, Dr. Yuri—who foresaw this dire event—assembles four powerful robots to create the Blocker Corps! He also recruits four members endowed with the super ability known as "elepath," a talent for piloting giant robots. A fierce battle for survival erupts between the Blocker Corps and Mogool! A series of fantastic and spectacular confrontations unfolds.

Concealed within the Arctic, the Gaira aliens hatch their scheme to take over Earth. After being kidnapped and coerced into their service, Dr. Yan constructs the supreme weapon: Groizer X, a transformable aerial robot. He entrusts it to his daughter Rita, who manages to flee from the Gaira and crash-lands in Japan. There, pilot Jo Kaisaka encounters the wounded Rita. Taking command of Groizer X, Jo joins forces with Rita to resist the Gaira invasion.

The series presents Japanese folktales, with each episode consisting of two stories. Its aim was to highlight folktales from various prefectures around Japan. The initial broadcast only ran for 18 episodes (36 stories) before being discontinued; the show was later rebroadcast, and the remaining 8 episodes (16 stories) were aired. The anime was family-friendly and sponsored by the Seibu Department Store chain, which attached a "Seibu Family Gekijou" subtitle to each episode—likely in an effort to mirror the highly successful "Calpis Family Gekijou" adoring the World Masterpiece Theater anime program.