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Cognomen Tsushima (ツシマ , Tsushima ) , all around the world, is a rare surname. The last name Tsushima is characteristic of Hong Kong, where it is a rare surname, Japan, and Argentina, where it is a very rare surname. In absolute terms, the name is most common in Japan, Brazil, and the United States. More prevalently, Tsushima is the forename as well as the last name.