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Family name Kawahara (カワハラ , 川原 , Kawahara ) , around the world, is quite a rare last name. The family name Kawahara is characteristic of Montenegro, where it is quite a rare surname, Hong Kong, where it is a rare surname, and Jamaica. Not in comparison with a country's population, it is commonest in the United States, Japan, and Brazil. More prevalently, Kawahara is the forename as well as the last name.