Mothra (1961)

The début film for Toho's other famous kaijū begins with a typhoon in the Pacific. It forces a ship's crew to seek refuge on Infant Island, a place believed to be radioactive. A return expedition there uncovers something wondrous, which the less moral members of humanity typically disrupt, enslave and exploit. Their selfish actions bring an island god incarnate to their door.
Not inherently evil — in fact, with intentions that are objectively good — Mothra nevertheless brings death and destruction to much of Tokyo, with a force that's interestingly similar to the one that wrecked the sailors' ship.
Action scenes are typical of kaijū films of the era, with some quality miniature buildings, but the exotic flora and Polynesian-esque culture stand out.

3 mysteries of life out of 5