Doyō

The Doyō (土用, doyou) are a group of six dog-like creatures that inhabit the Land of Mountains. They are also called the Legendary Dogs (伝奇的犬, densetsu no inuItalic text). The people of the Land of Mountains refer to these beasts as the origin of each Elemental Transformation of chakra. All six have two natures and can combine these natures at will to form Kekkei Genkai. Unlike the Tailed Beasts, they aren't malicious chakra in beast form, but actual living creatures. Also unlike the Tailed Beasts, they are unable to be sealed in hosts, preventing anyone from controlling thier power at will.