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Surname Uema (Uema , ウエマ ) , all over the world, is quite a rare last name. The cognomen Uema is characteristic of Latin America and the Caribbean, particularly Argentina, where it is a rare surname, Brazil, and Peru. Not in comparison with a country's population, it is commonest in Brazil, Argentina, and Japan. More prevalently, Uema is the forename as well as the last name.