Sage
From Narutopedia
A sage (仙人, Sennin) is someone who is able to utilize senjutsu (仙術, Sage Techniques), and has mastered the art of Sage Mode.
[edit] Senjutsu
Main article: senjutsu Senjutsu (仙術, Sage Techniques) refers to a specialized field of jutsu that allows the user to sense and then gather the natural energy around a person. Senjutsu practitioners can then learn to draw the energy of nature inside of them blending it with their own chakra (created from spiritual and physical energy within the shinobi), adding a new dimension of power to the Sage's chakra, resulting in the creation of "senjutsu chakra" (仙術チャクラ, senjutsu chakura).
This new chakra enables the user to enter a powered state called Sage Mode, which can then drastically increase the strength of all ninjutsu, genjutsu, and taijutsu. A person who is able to use senjutsu is called a sage (仙人, sennin). It would seem that it stems from the toads of Myōbokuzan, as only Shima, Fukasaku, Jiraiya and Naruto have been seen using it. Gamakichi and Gamabunta also seem to be familiar with it.
Very few people are shown to master senjutsu. Naruto and Jiraiya are the only two human beings who are seen using it, with Naruto the only one of the two to master it. This is because both learning and using senjutsu is not safe; death may easily occur while learning to use it. There are many toad sculptures on Myōbokuzan - these are petrified shinobi, who failed to master the art of senjutsu.
[edit] Other uses
"Sage" can also refer to an individual renowned for their great power, wisdom, or holy standing. One of the most famous sages in the series was the Sage of the Six Paths, a legendary figure who discovered chakra and created modern ninjutsu.
