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Cognomen Ямакава (Yamakawa , Ямакава , Yamakwa) , globally, is quite a rare last name. The surname Ямакава is characteristic of Peru, where it is a rare surname, Japan, and Brazil. Measured by absolute frequency, it is the most numerous in Brazil, Japan, and the United States. Much less frequently, Ямакава is the forename as well as the last name.