Kuraigakure

Kuraigakure (暗い隠れの里, Kuraigakure no Sato; Literally meaning "Village Hidden in the Dark") is a hidden ninja village in the Land of Night which is situated behind the Land of Wind. It is a village completely shrouded in darkness and outsiders speculate that the people who live there are demons.

History
The village was never allied with anyone and like Chōzōgakure, do not wish to fight for others. The village was shrounded in darkness to protect the village and to discourage visitors. The village is not surrounded by a wall because the ninja who guard the village and everyone else can see in the dark which acts as a natural defense. Any small light shone in the village's perimeter would not go unnoticed by the village making it impenetratable.