The Land of Volcanoes is a country situated south of the land of mountains (it shares a border with the mountain country). It is home to the hidden village Netsugakure no Sato (Village Hidden by the Heat). It has constantly hot weather and very rarely has rain. The Kage of Netsugakure also serves as the Daimyo of this land.
50 years ago, this country had a bloody war with the Land of Ice. With the Land of Gas being used as a battlefield. The ninja of the Gas country were none too pleased with this. The shinobi from the Land of Iron and the Land of Gas then teamed up to end the war (which they did) and to stop the to the 2 warring nations from destroying the Gas Country.