Hashirama belongs to the Senju Clan. They were also one of the clan responsible for founding Konoha, other being their Rival Uchiha Clan! I have listed 10 awesome facts about Senju Clan, and some of them are totally surprising!
10.Despite being known as a kekkei genkai, Hashirama Senju is the only known person to have naturally possessed Wood Release; all subsequent users have gained it by acquiring his genetic material — and even to then, their prowess with Wood Release paled in comparison to his.
9.Senju (千手) translates to A Thousand Hands or Lost.