御璽
Viscount was a Japanese politician and educator of the Meiji period, originally hailing from Toyooka, Hyōgo. He was active in the Monbu-shō (present Monka-shō) and as the president of institutions such as Tokyo Imperial University. Hamao was also, very briefly, Lord Keeper of the Privy Seal of Japan. He was ennobled as a baron on 23 September 1907 and advanced to viscount on 25 November 1921.