Moby Dick Five(1980)

Moby Dick Five is a science fiction series set in a world where ancient Atlantis, defeated in a prehistoric war with Mu, has returned to the present day as a small planet bent on global conquest. Five warriors from Mu gather on Easter Island to mount a defense, piloting a giant cyborg white whale powered by the consciousness of Mu's ancient queen. Together they battle Atlantis across the globe's most iconic ruins, combining mystical lore with mecha action in a clash between two lost civilizations fighting for supremacy in the modern world.