This is a traditional Hahoetal mask from the 12th century (Korean). There is a series of 12 masks. They're used in ritual dances/play. This one is of Yangban, he is the aristocrat and is usually being mocked in the play.

The pipe is Chinese I believe? Was just a little addition from me lol

Legend is something about a diety who told some dude to make masks in secret and so he hid away in his home doing the gods bidding. His girl gets fed up not seeing him for days so she secretly pokes a hole in his wall and spies on him. Since the rules were broken, the dude starts hemorrhaging blood and puking everywhere. The girl the dies of guilt and a broken heart. So the villagers then perform a dance as an exorcism thus elevating them so they can marry in the afterlife.