Giant Salamander Emerges from River in Japan. In Kyoto Japan, bystanders were surprised by the appearance of a giant creature. This strange animal was discovered on a footpath along the Kamo River where it must have come from. It is a Japanese Giant Salamander and is considerably rare to witness, especially since they make their home underwater and are only active at night. Check out the video to find out more about this slimy amphibian and why it may have turned up here.