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Last name ナオヒロ (Naohiro , ナオヒロ ) , globally, is a common surname. The family name ナオヒロ is habitual in Japan, where it is quite a common surname, Malaysia, where it is a very rare surname, and China, where it is an extremely rare surname. Much less frequently, ナオヒロ is the forename as well as the last name.