Kazake Senju

Kazake Senju (風邪気千手, Senju Kazake) is a shinobi hailing from Konohagakure's Senju Clan. His mother is of Sarutobi Clan blood while his father is a member of the Senju Clan, giving Kazake an outstanding amount of chakra. Kazake was even able to master the Wood Release Kekkei Genkai, thought only to be used by Hashirama Senju himself. The answer to this is that Kazake endured many experiments as a child, experiments mainly involving the implantation of Hashirama's cells. Kazake miraculously survived through the experiments, becoming the scientists' very first successful experiment. Kazake was rescued by a few shinobi of Konoha, soon being returned to his parents. His parents never mentioned anything of the incident, as Kazake would find out for himself about what happened.