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Surname Kayama (Kayama , 香山 , かやま) , in the entire world, is quite a rare last name. The last name Kayama is habitual in Zambia, where it is quite a rare surname, Nigeria, and Hong Kong, where it is a rare surname. In absolute terms, the name is most common in Nigeria, China, and Zambia. Likewise, Kayama is the forename as well as the last name.