What episode does Naruto tame 9 tails?

Naruto manages to tame Kurama during episode 329 of Naruto: Shippuden, as they worked together to save the rest of the Tailed Beasts.

How does Kurama become friends with Naruto?

The first inkling of their friendship began during Naruto’s Kurama Chakra control arc, where he had to win over the hatred in the latter’s heart. Although his mother had to help him suppress Kurama’s overwhelming Chakra, Naruto eventually won over the hatred in the tailed beast’s heart.