Land of Waves
The Land of Waves (波の国, Nami no Kuni) is a nation located in an island near the Land of Fire, and it does not have a hidden village, relying on seeking assistance from other Hidden Villages like Konohagakure. However when it was the Land of Whirlpools it used to have one, Uzushiogakure. The change of name and the loss of Uzushiogakure have not yet been explained.
Even if it was an isolated island and it relied on shipping for commerce and trade, it was prosperous. This changed when Gatō set his sights on it, breaking the people's will and monopolizing the shipping industry. In order to break this monopoly, Tazuna, a citizen of the Land of Waves, pursued the construction of a bridge connecting the island to the mainland. Team 7's first real mission was to this country and was meant to be a simple bodyguard mission to protect Tazuna but ended up completing a far more difficult mission fighting of Zabuza Momochi and Haku, and, later with the help of Zabuza and the townspeople ending Gato's reign of terror. With Gato gone, the bridge was completed, connecting the Land of Waves to the Land of Fire, increasing commerce and trade and bringing more revenue to the Land. It is now a prosperous area.
Sasuke Uchiha briefly visits the country in Part II, bringing Suigetsu Hōzuki with him so Suigetsu can retrieve Zabuza's Decapitating Carving Knife. Tazuna and some of the citizens of the Land of Waves assisted Konoha rebuild after Pain's attack on Konoha.