A ” Sennin ” (仙人, Sage ) is someone who is capable of using senjutsu (仙術; Literally means “Wise Techniques”), and has control over the art of Sage Mode or someone who receives the title because of his fame for his great power, wisdom, or saintly position.
Senjutsu (仙術; Literally meaning “Wise Techniques”) refers to a specialized field of techniques that allow the user to feel and then gather natural energy (自然 エ ネ ル ギ ー, shizen enerugī ) around a person.
Further information: Sage Mode , Wise Transformation and Juinjutsu Orochimaru
Senjutsu practitioners learn to draw nature’s energy into them by mixing it with their own chakra (created from spiritual and physical energy within the shinobi). This adds a new dimension of sennin chakra power, resulting in the creation of the “Senjutsu Chakra” (仙術 チ ャ ク ラ, senjutsu chakura ).
This chakra cannot be seen by anyone other than those who have been trained in senjutsu. This new chakra allows the user to enter a powerful state called Sage Mode , which can dramatically increase the strength of all ninjutsu, genjutsu and taijutsu.
A person who is able to use senjutsu is called Sennin (仙人, Sage). Currently, there are two known ways to learn senjutsu: one being learning from the frogs on Mount Myōboku like Jiraiya , Minato and Naruto did, and the other from the snakes in Ryūchi Cave where Orochimaru and Kabuto Yakushi learned. The cursed seals that Orochimaru used in the series also use the senjutsu chakra.
A third form of senjutsu is also known, used by Hashirama Senju . Unlike previous methods, Hashirama has no animal traits. It is not known where he got his senjutsu style. Very few people are shown to have mastered senjutsu.
This is because both learning and using senjutsu is not safe, death can easily occur while learning to use it. Fukasaku claims that the frog sculptures on Mount Myōboku are those that have failed to master the art of senjutsu. Naruto Uzumaki , Minato Namikaze , Kabuto Yakushi , Hashirama Senju , Orochimaru and Jiraiyathey are currently the only known human users of senjutsu. Other animals, like Fukasaku and Shima are also able to use it with Hakuja Sennin and Gamamaru among others, being knowledgeable about him.
Sennin” can also refer to an individual known for his great power, wisdom, or position as a saint.
- Hagoromo Ōtsutsuki , more commonly known as the Sage of the Six Paths (六道 仙人, Rikudō Sennin ), a legendary figure who discovered the chakra, created modern ninjutsu , saved the world from the Divine Tree with his brother and was also the first jinchūriki .
- As it was the first Ten-Tails jinchūriki, he was able to use natural energy in his techniques, just as the latter, Obito and Madara Uchiha , are capable as well. He was able to use the Six Paths Senjutsu from which he transferred to the reincarnation of his son , Naruto Uzumaki .
- Son Gokū’s nickname : The Great Sage Equalizing Heaven (斉 天 大聖, Seiten Taisei ) also mentions being a Sennin.