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Cognomen Yasukawa (安川 , 유 , Yasukawa ) , globally, is a widespread surname. The cognomen Yasukawa is characteristic of South Korea, where it is a common surname, Hong Kong, where it is a rare surname, and Australia. Measured by absolute frequency, this name is the most popular in Eastern Asia, particularly South Korea, China, and Japan. Much less frequently, Yasukawa is the forename as well as the last name.