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Cognomen Yasuo (ياسو , Yasuo , ヤスオ ) , in all the world, is a common family name. The last name Yasuo is habitual in Japan, where it is quite a common surname, Egypt, where it is quite a rare surname, and Israel. Measured by absolute frequency, it is the most numerous in Japan, Egypt, and China. Very seldom, Yasuo is the forename as well as the last name.