Shin Killer Crocodile: Akai kiba (1993)

A group of Japanese scientists goes to a small isolated village in the Thai mountains. A legend tells that the place is cursed, but also that a mysterious jewel would have been placed a long time ago in a sanctuary. After a long expedition, they finally discover a temple, located not far from a huge waterfall ... from which emerges a gigantic crocodile, the guardian of the treasure.