Argentina is 7.4 times larger than Japan.
Area: 2,780,400 km2 World Factbook
Population: 43,024,374 (July 2014) World Factbook
Argentina, officially the Argentine Republic is a federal republic located in southeastern South America. Wikipedia
Area: 377,915 km2 World Factbook
Population: 127,103,388 (July 2014) World Factbook
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south. Wikipedia