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Surname カワムラ (カワムラ , Kawamura ) , in the entire world, is quite a common cognomen. The cognomen カワムラ is characteristic of Hong Kong, where it is quite a rare surname, Japan, and Singapore, where it is a rare surname. Not in comparison with a country's population, it is commonest in Japan, Brazil, and the United States. More frequently, カワムラ is the forename as well as the last name.