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Surname コウゾウ (Kouzou , Kozo , コウゾウ ) , all around the world, is a common last name. The last name コウゾウ is habitual in Japan, where it is quite a rare surname, Bosnia and Herzegovina, and Hungary. In absolute terms, the name is most common in Japan, the Democratic Republic of the Congo, and Egypt. Much less frequently, コウゾウ is the forename as well as the last name.