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Cognomen Hirakawa (ヒラカワ , 平川 , Hirakawa ) , around the globe, is quite a rare surname. The last name Hirakawa is habitual in Hong Kong, where it is a rare surname, Brazil, and Japan. In absolute terms, it is commonest in China, Brazil, and Japan. More prevalently, Hirakawa is the forename as well as the last name.