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In all the world, ミツオ (Mitsuo , ミツオ , Mituo ) is a rare boy's given name. The first name ミツオ is characteristic of Japan, where it is a rare boy's name, Bolivia, and Peru, where it is a very rare male name. Not in comparison with a country's population, the name is most common in Japan, China, and the United States. More frequently, ミツオ is the last name as well as the forename.