This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Nuppeppo (Japanese)
Nuppeppo are bizarre and creepy and found in ruined temples, overgrown graveyards, and other dilapidated areas. These creatures are known for their revolting appearance and smell; they give off a strong odor of rotten meat. They look like large, flabby, roughly humanoid chunks of flesh about the size of child, with lumpy, undeveloped hands and feet, and vaguely indiscernible facial features.
Nuppeppo appear usually only at night, and are not known to cause any particular harm or mischief—other than being disgusting. They seem to enjoy the nauseating effect their smell has on passersby. They frequently cause chaos and havoc by running around and disgusting people, and outrunning angry villagers who would try to chase them down and kill them.