Rokurokubi are demons found in Japanese folklore. They look like normal human beings by day, but at night they gain the ability to stretch their necks to great lengths. They can also change their faces to those of terrifying oni to better scare mortals. In their daytime human forms, rokurokubi often live undetected and may even take mortal spouses. Many rokurokubi become so accustomed to such a life that they take great pains to keep their demonic forms secret.
Ushi-oni (lit. "cow devil") is a malevolent sea monster with the head of a bull and the body of a giant spider or crab. It is most often encountered in the coastal waters of western Japan, particularly in Shimane prefecture, where it is feared for its vicious attacks on fishermen
The Bakemono Zukushi handscroll, painted in the Edo period century) by an unknown artist, depicts 24 traditional monsters that once used to spook the people of Japan. Sara-hebi (shown here) is a large, snake-like creature with the head of a woman.