Source: Yokai series and Japanese Folklore
Location: Japan often in a closet
Threat Assessment: -2. It's an umbrella with one eye, one leg, and arms. It has a long long tongue. It might lick you to death in a hundred years.
Limitations: A stiff wind or a match should take care of any umbrella monster infestations.
Personal Note: The worst thing about Umbrella Monsters is they often have much more dangerous friends.