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Cognomen ญี่ปุ่น (Japanan , Japate , ญี่ปุ่น) , in the world, is a rare last name. The last name ญี่ปุ่น is characteristic of Thailand, where it is a very rare surname, and India. Much less frequently, ญี่ปุ่น is the forename as well as the last name.