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Family name 上原 (Uehara , 上原 , Uyehara ) , all over the world, is quite a common surname. The surname 上原 is characteristic of Brazil, where it is quite a rare surname, Peru, and Japan, where it is a rare surname. In absolute terms, it is commonest in Brazil, the United States, and Japan. Very seldom, 上原 is the forename as well as the last name.