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Surname Hidaka (ヒダカ , Hidaka , 리나 ) , in all the world, is quite a rare cognomen. The family name Hidaka is habitual in Japan, where it is a rare surname, Singapore, and Estonia. Measured by absolute frequency, this name is the most popular in Japan, Brazil, and the United States. More prevalently, Hidaka is the forename as well as the last name.