1966 · Japan - Shigeo Tanaka
Hurtling through space, a meteorite collides with the rocket transporting Gamera to Mars. Gamera, now unleashed, returns to Japan, destroys Kurobe Dam and takes off. Meanwhile, a mysterious group of travellers visit an island in the South Pacific. They plan to steal a huge opal from a cave protected by a local village. Eventually, they journey to the cave and find the opal.