Tsutsuga

The Tsutsuga are a form of shapeshifting Yokai from Japan. They are capable of taking the form of bugs, birds, vermin, will o wisps, fog, or recognizable religious figures. They sneak into houses at night to infect humans with various diseases and feed on the misery of those it makes sick. Many victims of the Tsutsuga become miserable enough in their sickness to commit suicide, which also feeds the Tsutsuga. The Kara-Mon gate has a bronze statue of one.

Citations:

La Boda, Sharon. International Dictionary of Historic Places: Asia and Oceania. United Kingdom, Fitzroy Dearborn, 1994.

Guides, Insight. Insight Guides Japan (Travel Guide EBook). United Kingdom, Apa Publications, 2018.

Maberry, Jonathan. Vampire Universe: The Dark World of Supernatural Beings That Haunt Us, Hunt Us, and Hunger for Us. United States, Kensington Publishing Corporation, 2006.