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Family name ヤスオ (Yasuo , ヤスオ ) , in all the world, is a common cognomen. The family name ヤスオ is characteristic of Japan, where it is quite a common surname, Israel, where it is quite a rare surname, and Taiwan. Measured by absolute frequency, it most frequently occurs in Japan, China, and Egypt. Very seldom, ヤスオ is the forename as well as the last name.