Here's how he could achieve that without the Rinnegan. Later on, in Boruto: Two Blue Vortex, it was revealed that Kurama was reincarnated inside of ... that he will have to make do with whatever ...

While it was surprising for most viewers to see Kurama alive as he died during Naruto's fight with ... Hinata might have also passed Hamura's chakra to her. According to Nine Tails in Boruto ...