According to the official Naruto canon, Hagoromo Otsutsuki, also known as the Sage of Six Paths (Rikudo Sennin), originated the concept of ninjas. Isshiki Otsutsuki and his dreadful father, Kaguya Otsutsuki, travelled to Earth to collect the collective chakra of humanity and the chakra fruit. Before she fell in love with King Tenji, she had every intention of entering the royal family via marriage. It is revealed in Naruto Shippuden that Kaguya had two children, whose names are Hagoromo and Hamura Otsuki.
Hagoromo Otsutsuki, who remained on Earth to promote the idea of Ninshu or Ninjutsu while Hamura was imprisoned on the Moon, was widely regarded as the Savior of this World, Kono Yo no Kyseishu. Hagoromo Otsutsuki remained on Earth to promote the idea of Ninshu or Ninjutsu, while Hamura was imprisoned on the Moon. The Sage of Six Paths, Hagoromo Otsutsuki, was the first to have access to the Rinnegan rather than the Byakugan, the more common of the two sages’ natural skills. The Byakugan was the more frequent of the two sages’ innate talents.
Why Naruto’s Sage of Six Paths, Hagoromo Otsutsuki, is legendary
When Kaguya tasted the Chakra fruit, which only appeared on the Divine Tree once per millennium, she jumped back on the bandwagon to gather as many as possible. After accumulating an unfathomable amount of power, Kaguya instantly stopped all contemporary conflicts. She climbed the Divine Tree’s Ten-Tails to perform the Infinite Tsukuyomi, but she eventually ran out of chakra and had to retreat. Her plans were stopped, however, when Hagoromo Otsutsuki and Hamura imprisoned their mother beneath the moon. Hamura stayed on the moon as Hagoromo held the Ten-Tails inside himself. Hagoromo was able to control them. After some time, the Sage of Six Paths used the technique known as the Creation of All Things jutsu to break the Ten-Tails down into nine separate Tailed Beasts.
A rivalry that has lasted for centuries
The whole Naruto saga began with the two offspring of Hagoromo Otsutsuki and the manipulation of Black Zetsu. The Sage of Six Paths just sought to instil a sense of self-defence among his disciples, but Indra, the eldest of his sons, completely changed the course of Ninshu with his innovations. In contrast to his less gifted sibling Ashura, Indra had learned about jutsu at a young age and was considered a genius. But he had a very different vision for the future of the Ninshu faith than either his father or Ashura.
Even though Ashura’s skill paled compared to Indra’s, he received the highest acclaim from Hagoromo Otsutsuki. Indra (Madara Uchiha) and Ashura (Senju) became bitter enemies as a consequence, sparking an age-old feud that has now evolved into the modern Senju vs Uchiha conflict (Hashirama Senju). Sasuke Uchiha and Naruto Uzumaki, the incarnations who came after them in the next age, were the ones that carried on the rivalry started by their predecessors. Thankfully, they could come to a more amicable agreement, exactly as Hagoromo Otsutsuki, the Sage of Six Paths, had predicted.