Gamera

Japanese scientists on an expedition are given a "devil stone" by an Eskimo chieftain. The resulting cataclysm awakens a giant, prehistoric monster called Gamera, who has the appearance of a giant turtle with teeth and large tusks. The monster heads to Japan and surfaces from Sagami Bay, where Toshio, a boy releasing his own pet turtle, sees him. Gamera destroys the city of Fujisawa and a lighthouse and retreats back into the sea.