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In all the world, Hidaka (ヒダカ , Hidaka , 리나 ) is a rare epicene forename. The first name Hidaka is characteristic of Eastern Asia, particularly South Korea, where it is quite a rare feminine name, and China, where it is a very rare principally masculine, but scarcely feminine name. Much less frequently, Hidaka is the last name as well as the forename.
Hidaka is also a name for the fictitious and mythical characters: Lina Inverse , the fictional character from the Slayers franchise; Lina Greff , the fictional character from The Tin Drum by Günter Grass; Lina Svensson , the fictional character in television series Svensson, Svensson and Lina , the fictional character created by Astrid Lindgren, Emil from Lönneberga.