Board Thread:Theories and Speculation/@comment-25547449-20160618183651/@comment-1512913-20160618190005

Well, the main/branch system existed on the Moon and Hamura was said to have inherited leadership of the clan, but he himself was second born, Hagoromo being first, so Hamura should have been branch family, yet he started a main family, suggesting it was established after Kaguya.