Boruto Episode 132 has revealed more information about the theory of Jiraiya being related or linked to Kashin Koji since Jiraiya Realized Traveler is Sasuke Uchiha. He also knows Boruto's chakra is linked to Naruto's so that's why they can create a new Rasengan against Urashiki Otsutsuki. In Boruto episode...
Naruto Uzumaki frees Kurama, Sasuke Uchiha enlists the perfect Susano'o to combat the Otsutsuki power that Jigen manifests, however it is all useless before the overwhelming force and finally the God who dominates that body Isshin Otsutsuki the first companion of Kaguya who is revealed proceed to sweep the ground...