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Family name Комияма (Komiyama , 込山 , Комияма) , in all the world, is a rare surname. The cognomen Комияма is habitual in Japan, where it is a rare surname, Australia, and Brazil, where it is a very rare surname. Measured by absolute frequency, it is commonest in Brazil, Japan, and the United States. Likewise, Комияма is the forename as well as the last name.