This is a private training grounds used only by ANBU Members Only.
After a few wars, the underground training area has gotten deeper and deeper within the ground making it wider than the building above it of which it is housed in. Due to the help of Raiden Uchiha, un-meltable/un-breakable ice sits around it making it very chilly in the training grounds.
Naruto: The Way of Shinobi
A Naruto guild based off creativity. Almost everything is customizable and you can create your own characters.
