Ninshū (忍宗, Viz: Ninja Creed, literally meaning: Shinobi Sect) is the religion and the peaceful precursor of modern ninjutsu created by Hagoromo Ōtsutsuki, the first one to understand and teach the mystery of chakra. The teachings of ninshū were meant to give people a better understanding of themselves, as well as others, and lead the world into an era of peace. Ninshū would eventually come to be known as ninjutsu, a more weaponised version of the Sage's teachings.
Hagoromo exemplified his teachings by distributing chakra meant to "connect" people's spiritual energies with one another. It would allow people to understand each other without communication and pray for one another's safety. After being passed over as the successor of ninshū over his brother, and subsequently manipulated by Black Zetsu, Indra Ōtsutsuki was the first to weaponise it into ninjutsu.
Others followed his footsteps, using chakra to connect their inner spiritual and physical energies together instead of each other. It was Hagoromo's belief that no one's chakra should be so much greater than any other. If the power is accumulated into one person, then it increases the possibility that the person will become arrogant and desire even greater power. In the end, they ended up using their chakra in battle, just as Hagoromo's mother Kaguya did.
- Naruto Uzumaki distributing his and Kurama's chakra to connect and protect his fellow shinobi during the Fourth Shinobi World War bears many similarities to Hagoromo's original intent by originally distributing chakra as a whole.
- Killer B prominently displays something similar to Hagoromo's intended use of chakra in his ability interpret the hearts of others. Through a simple fist bump, he can read someone's thoughts and memories, transmit his own, and enter their mental landscape. This lets him recognise even complete strangers and how important they are to someone he knows.
- In The Last: Naruto the Movie, when Iruka asks his pupils who they want to spend their last day on earth with, a sentence that is likely one of the teachings of Hagoromo's ninshū can be seen. It says "Ninja Arts 36 Strategies: Thinking about the future is thinking about the present" (忍法三十六計 未来を考える事は現在を考える事, Ninpō Sanjūroku Kei: Mirai o kangaeru koto wa genzai o kangaeru koto) and is signed by the Sage of Six Paths.
- Fourth Databook, page 25
- Naruto chapter 505, pages 5-6
- Naruto chapter 541, page 13
- Naruto chapter 494, page 14
- Naruto chapter 536, pages 1-3
- Naruto chapter 227, page 8