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Surname ヤスコ (Yasuko , ヤスコ ) , all around the world, is a common family name. The cognomen ヤスコ is habitual in Japan, where it is quite a common surname, Israel, where it is a rare surname, and Malaysia, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Japan, China, and Israel. Very seldom, ヤスコ is the forename as well as the last name.