Yamigakure (闇隠れの里, Yamigakure no Sato, Literally meaning: Village Hidden in the Darkness) is the shinobi village of the Land of Demons. Its ninja are renowned for their assassination techniques to the point of being nearly destroyed during the Second Shinobi World War by the combined efforts of Kumo and Iwa. It did not help that they decided to name their leader the Shinkage (真影 True Shadow), infuriating the Five Great Shinobi Countries. Only the sacrifice of the man known as the First Shinkage (初代真影, Shodai Shinkage, Literally meaning: First True Shadow) that there were any survivors, albeit unknown to the rest of the world. They have been rebuilding ever since.
In terms of appearance, the village's location resided in a dense forest with large tower-like trees and river running through it. There are building constucted on trees, ranging from on their roots to high up in the branches. Various bridges would connect the village like a web.
Generally Genin (下忍, Literally meaning: low ninja) are allowed to wear whatever they want, so long as the colors are dark, in order to help with their stealth. From Chūnin (中忍, Literally meaning: Middle Ninja) every ninja is expected to wear the standard issue uniform in black/dark grey/dark blue with a black flak jacket. Personal accessories are allowed so long as they don't compromise the shinobi on missions.