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Cognomen Katayama (カタヤマ , Katayama , Катаяма ) , worldwide, is quite a rare last name. The family name Katayama is habitual in Israel, where it is a rare surname, Hong Kong, and Singapore. Not in comparison with a country's population, it is the most numerous in Brazil, Japan, and the United States. More frequently, Katayama is the forename as well as the last name.