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Surname 俊基 (俊基 , Junji ) , in all the world, is quite a rare family name. The cognomen 俊基 is habitual in Japan, where it is quite a rare surname, Singapore, where it is a rare surname, and Malaysia, where it is a very rare surname. Measured by absolute frequency, the name is most common in Japan, China, and India. Also, 俊基 is the forename as well as the last name.