KAMI
Japanese Mythology
This is the name of a gigantic fish in the mythology of Japan. The KAMI is described in the sacred literature of Japan as being a vast fish that resembles a cat fish whose body is in the great ocean beneath the islands of Japan. It was the movement of this enormous fish that made many of the earthquakes above it in the islands. However, after one such episode the great deity of Deer Island took an enormous sword and speared it deep through the earth down into the great ocean and straight through the head of KAMI, transfixing it forever.
Henceforth, whenever the KAMI wriggled beneath the islands, the Great Deity would take hold of the hilt of the sword and apply pressure to the head of the KAMI until it was still. This great sword is carved from a granite rock in the temple, and during the seventeenth century one of the lords of the island had his men dig to find the point. After six days the point of the sword had still not been reached, and they gave up.
Source: Giants, Monsters, and Dragons: An Encyclopedia of Folklore, Legend, and Myth