Wakan Sansai Zue
Chimi are said to be monsters that come about from strange atmosphere (miasma) in mountains and forests. Taking on an appearance with the face of a human, and the body of a beast, they would perplex humans. In the dictionary "Wamyō Ruijushō" from the Heian period, they were considered to be a type of oni under the Japanese name "sudama", and in the Edo period encyclopedia, the "Wakan Sansai Zue", they were seen to be mountain gods (Yama-no-Kami).