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Cognomen サトウ (サトウ , Sato , Satow ) , around the world, is a common surname. The last name サトウ is characteristic of Japan, where it is quite a common surname, Hong Kong, where it is quite a rare surname, and Singapore. In absolute terms, it most frequently occurs in Brazil, Japan, and the United States. More prevalently, サトウ is the forename as well as the last name.