Board Thread:Boruto Discussions/@comment-1458758-20171229124917/@comment-33953813-20171230132037

Katasuke was a doctor back then? I thought he was a scientist from the start.

The prosthetics sure are new additions done by Katasuke but I think there's more to that. It just doesn't seem natural for him alone to survive such a heavy attack while only due to his "conviction". Someone has helped him deal with this great deal of damage at that time and after that he must have gone to Katasuke for rehabilitation.

I think a member from Kara helped him survive the ten tails tailed beast bomb. So he is kinda indebted to them. This is what I think.