Board Thread:Theories and Speculation/@comment-1872728-20160305150743

There are 3 aspects to chakra:

First is the Shape and Structure, where Shape refers to Shape Transformation and Structure refers to Yin Yang Release. Yin Yang Release is not considered an elemental nature because it doesn't change the chakra into a specific element, rather it changes the balance (positive & negative) of the structure of the chakra. Used for any jutsu, and without a prefix (eg. Rasengan). Since they're the fundamentals, they're not mentioned in the jutsu name.

Second is the Elemental Nature, which refers to Nature Transformation. Used for any jutsu, and with a prefix of "Something Release: Something no jutsu" (eg. Lightning Release: Chidori). This prefix is put after the Composition prefix (eg. Sage Art: Wind Release: Rasenshuriken).

Third is the Composition, which is listed below:

Physical Energy + Spiritual Energy = Chakra. Used for ninjutsu, and with a prefix of "Ninja Art: Something no jutsu" (eg. Ninja Art: Dance of the Snowy Cherry Blossom), but is rarely used since all jutsu are implied to be Ninja Art.

Physical Energy + Spiritual Energy + Natural Energy = Sage Chakra. Used for senjutsu, and with a prefix of "Sage Art: Something no jutsu" (eg. Sage Art: Gate of the Great God).

Physical Energy + Spiritual Energy + Otsutsuki Energy = Path Chakra. Used for dojutsu, and with a prefix of "Something Path: Something no jutsu" (eg. Deva Path: Shinra Tensei, Six Paths: Chibaku Tensei).

Physical Energy + Spiritual Energy + Otsutsuki Energy + Natural Energy = God Chakra. Used for shinjutsu (神術, God Jutsu), and with a prefix of "God: Something no jutsu" (eg. God: Nativity of a World of Trees).

God Tree has roots all over Earth, and when it sucked the blood of everyone, he also sucked the Physical and Spiritual Energy of everyone, which ended in making the first ever chakra. Then it combined the Natural Energy he sucked, and made Sage Chakra. So the God Tree is technically the progenitor of Chakra and Sage Chakra. Kaguya then ate the fruit, combining with her Otsutsuki Energy, created God Chakra. 