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Family name Matsuoka (マツオカ , Matsuoka , Мацуока) , worldwide, is quite a rare last name. The last name Matsuoka is habitual in Paraguay, where it is quite a rare surname, Hong Kong, and Japan, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Brazil, Japan, and the United States. More frequently, Matsuoka is the forename as well as the last name.