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Family name Ouchi (オオウチ , Ouchi , أوشي ) , across the world, is quite a rare cognomen. The surname Ouchi is characteristic of Cayman Islands, where it is quite a rare surname, Libya, where it is a rare surname, and Tunisia. In absolute terms, it is commonest in Brazil, Japan, and the United States. More prevalently, Ouchi is the forename as well as the last name.