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Cognomen Uesaka (Uesaka , 上坂 ) , globally, is a very rare family name. The family name Uesaka is habitual in Germany, where it is a very rare surname, Indonesia, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Indonesia, China, and Germany. Likewise, Uesaka is the forename as well as the last name.