Tree Felling Village

The Tree Felling Village is a peaceful town controlled by the dark demon, Black Shadow, who protects the village in exchange for human sacrifices. The "Tree Of Life" once stood in this village, but is was cut down by their ancestors generations earlier.

Black Shadow
A powerful, beast whose only weakness is the leaves on the Tree of Life and lives in the Crystal Cave which villagers get their products but because of him the villagers were having a hard time mining and selling their products, His true form is a black fox with numerous tails, two snouts, five eyes and six legs, it was later then defeated by Naruto in the the Nine tails state.

The Tree of Life
The Tree of Life's leaves keep Black Shadow sealed in the caves and its leaves can cure any disease just like it healed Aoi's mother, Tsubaki. And one of its remaining leaves are in Aoi's necklace.

Trivia

 * The Tree Felling Village is now called the The Tree Reviving Village because of the reviving of the village