Each hidden ninja village is ruled by a Kage. And each respresents its country's element type. Meaning a ninja from a certain country will have (in most cases) techniques which involves his/her country's element. There are 10 countries total. Earth Country, Fire Country, Grass Country, Lightning Country, Rain Country, Sound Country, Wave Country, Water Country, Waterfall Country, and Wind Country.
Here is 19 ~ 20 of 20.
