Within a thick layer of mist lay warriors who carry only one passion; to fight until the day they die. Do not mistake their rash and forward nature as suicidal, for before you can even see them, you will wind up like the bodies hidden within this mist; forever unable to return home or step foot in this earth ever again. (Ooikage)
This the non-civilian zone of the village. It basically has all the training grounds as well as the hidden ANBU headquarters and the military medical center. Plus more shinobi-exclusive facilities.