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Last name Ishiguro (イシグロ , Ishiguro ) , in the world, is a rare cognomen. The surname Ishiguro is habitual in Marshall Islands, where it is quite a common surname, Hong Kong, where it is a rare surname, and Japan. Not in comparison with a country's population, it most frequently occurs in Japan, Brazil, and Indonesia. More prevalently, Ishiguro is the forename as well as the last name.