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Surname 新開 (Shinkai , Sinkai , 新開 ) , in all the world, is a rare last name. The cognomen 新開 is characteristic of Hungary, where it is a rare surname, Portugal, and Brazil, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Brazil, Indonesia, and Japan. More frequently, 新開 is the forename as well as the last name.