Nurarihen

Nurarihen, or Nuurihen ( 滑瓢 ぬらりひょん、、ん, literally "elusive") — ayakashi (the supreme demon-yokai) from Japanese folklore, the leader of the hyakki yako ("procession of a hundred spirits"), sometimes even depicted as the leader of other Youkai.

In Japanese mythology, a mysterious and powerful spirit that looks like a good-natured old man with a big head. Known as the "Supreme Commander over All Monsters".

The legends of Nurarihen appeared, it is believed, on the territory of the modern prefecture Wakayama. According to one theory, the mythical prototype of this creature in fairy tales is the "sea monk" umibozu from the prefecture Okayama, and the real one is an octopus or a large jellyfish (because of the size of his head).