Rasengan, Narutopedia

The Rasengan is a jutsu that takes form as a spinning ball of chakra, invented by Minato Namikaze. Minato came up with the idea for this technique after seeing a Tailed Beast Ball being used. Because his lover, Kushina Uzumaki, was a jinchūriki, she would inevitably be deployed to fight opponents who would use Tailed Beast Balls against her. Minato therefore wanted to develop a technique that Kushina could use to match against those opponents, which also worked with her chakra volume as a jinchū

Rasengan, Wiki

Which is the strongest rasengan? : r/Naruto

Which is more powerful, Rasenshuriken or Compression Rasengan? - Quora

Kagutsuchi Rasengan, Narutopedia

Narutopedia OC - Hinami Chigo! by ChigoSenpai on DeviantArt

Rainbow Rasengan

Naruto: Shippuden (season 15) - Wikipedia

Vanishing Rasengan, Narutopedia

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Naruto Uzumaki – Wikipédia, a enciclopédia livre

When was it said that this jutsu used senjutsu? : r/Boruto

Rasengan - Naruto Wiki - Neoseeker

Who created the Rasengan in Naruto?