Board Thread:Naruto Discussions/@comment-27662856-20180316054643/@comment-6769189-20180318113107

@killman: byakugan users are trained from an incredibly young age with their Byakugan. I dont think it has been mentioned to need chakra to maintain but it might be a similar tging to Itachi where the chakra drain is minimal due to having used it for so long or through conditioning.