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All around the world, カズオ (Kazuo , カズオ ) is quite a rare unisex first name. The forename カズオ is characteristic of Japan, where it is quite a rare epicene name, the United States, where it is a rare male name, and Sweden. In absolute terms, it most frequently occurs in Japan, the United States, and China. More prevalently, カズオ is the last name as well as the forename.
カズオ is also a name for the fictitious and mythical characters: Kazuo Saki , the fictional Teenage Mutant Ninja Turtles character, My Brother, the Bad Guy; Kazuo Kiriyama , the Battle Royale character; Kazuo Uzuki and Kazuo Tachibana , the fictional human from Captain Tsubasa.