Nuppeppō

"[4] The aforementioned Shingo Zade Hōdai Mōgyū also writes, "it sucks the fat of the dead and eats to the fullest with a needle.

It is said that as an embodiment of this "whitening," the nuppepō would first impersonate a human (pretending not to know), come to a pedestrian and talk as if friendly (speaking frankly), and as that person is letting their guard down, they'd show their true form (become open and unconcealed) and show their original appearance (a white monster, as if having applied white facial powder).

[5] In the literature starting in the Shōwa and Heisei periods, it was written to be a yōkai that appears near abandoned temples,[6] but this comes from the passage "on the eaves of old temples would appear the nuppepō, almost like a lump of trouble itself" from the book Yōkai Gadan Zenshū Nihonhen Jō (妖怪画談全集 日本篇 上) by the folklore scholar Morihiko Fujisawa, so it's been suggested that Fujisawa's statement of "appearing at temples" is nothing more than an original made-up creation imagined from the background in the Gazu Hyakki Yagyō.

Someone who later heard this tale and was knowledgeable about pharmaceutics noted that this is the "Feng" (封) mentioned in old Chinese texts, and it was also written about in the Bái Zé Tú, and regretted a missed opportunity because eating its meat is a panacea that grants great power.

Though largely amorphous, fingers, toes, and even rudimentary limbs may be attributed as features amidst the fold of skin.

[9][11] The nuppeppō aimlessly wanders deserted streets of villages, towns and cities, often at night towards the year-end, or graveyards or abandoned temples.

[14] The 18th century scribe Makibokusen wrote a scroll describing the appearance of a creature matching the description of the nuppeppō at the castle of shōgun Tokugawa Ieyasu.