Board Thread:Naruto Discussions/@comment-24577388-20140920215210/@comment-1512913-20140920215932

Most likely the Shikotsumyaku besides the Byakugan. Chakra Chains are an Uzumaki thing. Uzumaki are relatives of Senju, who are descendants of Ashura who is son of Hagoromo, it's very unliekly Hamura would have something only late descendants of his brother's son have.