Re: naruto's Rinningan is the itachi's Gift to Naruto
From Wikipedia: Samjoko.
In Japanese mythology, this flying creature is a raven or a Jungle Crow called Yatagarasu (八咫烏?, "eight-span crow"); and the appearance of the great bird is construed as evidence of the will of Heaven or divine intervention in human affairs.
Although Yatagarasu is mentioned in a number of places in the Shintō canon, there is very little explanation, and much of the material is contradictory. This great crow was sent from heaven as a guide for Emperor Jimmu on his initial journey from the region which would become Kumano to what would become Yamato. It is generally accepted that Yatagarasu is an incarnation of Taketsunimi no mikoto, but none of the early surviving documentary records are quite so specific.
On many occasions, it appears in art as a three-legged bird, although there is no description stating that the Yatagarasu was three-legged in the Kojiki.
From Wikipedia: Amaterasu
Amaterasu (天照?), Amaterasu-ōmikami (天照大神／天照大御神?) or Ōhiru-menomuchi-no-kami (大日孁貴神?) is a sun goddess and one of the principal Shinto deities (神, kami?). The meaning of her name, Amaterasu-ōmikami, is "the great august kami who shines in the heaven". She was born from the left eye of Izanagi as he purified himself in a river and went on to become the ruler of the Higher Celestial Plain (Takamagahara).
She is also said to be directly linked in lineage to the Imperial Household of Japan and the Emperor, who are considered descendants of the kami themselves.
From Wikipedia: Tsukiyomi
Tsukuyomi (ツクヨミ?, also known as Tsukuyomi-no-kami), is the moon god in Shinto and Japanese mythology. The name Tsukuyomi-no-Mikoto is a combination of the Japanese words for "moon; month" (tsuki) and "to read; to count" (yomu). Another interpretation is that his name is a combination of "moonlit night" (Tsukiyo) and a verb meaning "to look at" (miru). Yet another interpretation is that the kanji for "bow" (弓, yumi) was corrupted with the kanji for "yomi". "Yomi" also may refer to the Japanese underworld, though this interpretation is unlikely.
I bolded all the parts I wanted people to see if they didn't want to read all that shit. Izanagi was also a Shinto God reference. Same as Susanoo. And if you didn't know what I am trying to say, I think that Samjoko, or Yatagarasu was the gift that Itachi gave Naruto. It would make a ton of sense, seeing as Yatagarasu was a crow of sorts, and Itachi shoved a crow down Naruto's throat...