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Cognomen ヤスシ (Yasushi , ヤスシ , Yasusi ) , worldwide, is a common last name. The cognomen ヤスシ is characteristic of Japan, where it is quite a common surname, Taiwan, where it is a rare surname, and Singapore. Measured by absolute frequency, it is the most numerous in Eastern Asia, particularly Japan, China, and Taiwan. Very seldom, ヤスシ is the forename as well as the last name.