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Cognomen Кавагути (Kawaguchi , 河口 , Кавагути) , around the globe, is quite a rare last name. The cognomen Кавагути is habitual in Singapore, where it is a rare surname, Japan, and Canada. Measured by absolute frequency, it is commonest in Japan, the United States, and Brazil. Very seldom, Кавагути is the forename as well as the last name.