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Hiroyama played professional football in Japan, France, Portugal, Paraguay, Brazil and the United States. He started his career in Japan with JEF United Ichihara Chiba before moving to France to play for Paris Saint-Germain. He then had spells with Portuguese clubs Vitória de Guimarães and Belenenses, Paraguayan club Club Guaraní, Brazilian club Sport Club Corinthians Paulista, and American club Chicago Fire.