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Cognomen Nishihara (ニシハラ , Nishihara ) , globally, is quite a rare family name. The last name Nishihara is characteristic of Bolivia, where it is a rare surname, Hong Kong, and Japan. Not in comparison with a country's population, it is the most numerous in Japan, Brazil, and the United States. More prevalently, Nishihara is the forename as well as the last name.