Hikari Sentai Maskman (1987)

Commander Sugata discovered the existence of the Royal Underground Empire Tube, a malignant force that desires to dominate the land, which is based underneath Japan.

He recruits five young people, each one specializing in a style of martial arts, and teaches them in the ways of the mystical "Aura Power" energy.

A year after he recruited and trained the Maskmen, Tube is ready to strike.