Nebutori (寝肥り Nebutori, lit. Sleeping Fatty) is either a supernatural symptom or a Yōkai.
Nebutori as a woman named Haruka appears in episode #80 of the fifth anime adaptation, Beautiful Woman and Nebutori! Continuous Yōkai Incidents.
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Nebutori in legends have been regarded as a supernatural symptom on humans rather than a yōkai.
The name Nebutori is a Japanese play on words with the kanji ne (寝, lit. sleep) and futori (太り, lit. to gain weight).