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Family name Yonezawa (ヨネザワ , 嘉博 , Yonezawa ) , across the world, is a rare surname. The surname Yonezawa is characteristic of Singapore, where it is a rare surname, Japan, and Brazil. In absolute terms, it is commonest in China, Brazil, and Japan. More frequently, Yonezawa is the forename as well as the last name.