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Family name アダチ (アダチ , Adachi , Adati ) , all around the world, is quite a common cognomen. The family name アダチ is habitual in Bhutan, where it is quite a common surname, Equatorial Guinea, where it is quite a rare surname, and Japan. Measured by absolute frequency, it is commonest in Japan, Brazil, and the United States. More frequently, アダチ is the forename as well as the last name.