Nanakusa Island

The is an island located somewhere east of the Land of Fire and south of the Land of Lightning. It is known for the large variety and abundant reserves of herbs and other ingredients used in Military Rations Pill and various medicines. According to Tsunade, as an uninhabited island, it is considered a neutral territory.

The Hell Valley is located on this island. The mud that gushes out underground here is an "Elixir Mud" that can be used to heal bruises, cuts, and sprains. Gas is released from underground that can toxic if exposed to it for long period of time. A large lizard also inhabits this valley.