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The Last was never adapted into a special or anything like that. Boruto: Naruto the Movie WAS adapted into a saga that helped to expand the cast far more based on the development of the series.
From what I get, chakra is based on hinduism. Rinnegan already means "Samsara Eye" with the first word being a common trait often seen in hiinduism. Still, the series uses multiple mythologies. While Sasuke's Kirin technique appears to be Chinese, most of his other traits are related to Japan.
For example, Sasuke's last name is based on the Uchiwa. Uchiwas were said to use to protect people from evil foxes (which explains on how he is related with Naruto).
Jiraiya's characfter is also based on Kabuki by the way
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