The nuppeppō is a yōkai that appears in Edo Period yōkai emaki such as the Gazu Hyakki Yagyō and the Hyakkai Zukan. It is depicted with indistinguishable wrinkles on its face and body as a one head blob of meat.
Nuppeppō (ぬつへつほう) from Bakemono no e (化物之繪, c. 1700), Harry F. Bruning Collection of Japanese Books and Manuscripts, L. Tom Perry Special Collections, Harold B. Lee Library, Brigham Young University.
"Nuppepō" (ぬつへつほう) from the Hyakkai Zukan by Sawaki Suushi
"Nuppepō" (ぬつへつほふ) from the Gazu Hyakki Yagyō by Toriyama Sekien
Gazu Hyakki Yagyō is the first book of Japanese artist Toriyama Sekien's famous Gazu Hyakki Yagyō e-hon tetralogy, published in 1776. A version of the tetralogy translated and annotated in English was published in 2016. Although the title translates to "The Illustrated Night Parade of a Hundred Demons", it is based on an idiom, hyakki yagyō, that is akin to pandemonium in English and implies an uncountable horde. The book is followed by Konjaku Gazu Zoku Hyakki, Konjaku Hyakki Shūi, and Gazu Hyakki Tsurezure Bukuro.
Kodama (木魅) Sekien's comments: (kami) are said to appear in ancient trees. (百年の樹には神ありてかたちをあらはすといふ。)
Tengu (天狗)
Yamabiko (幽谷響)
Yamawaro (山童)
