Shikoku (四国, "four provinces") is the smallest and least populous of the four main islands of Japan. It contains the prefectures of Ehime, Kagawa, Kochi, and Tokushima.
Population: 4.5 million. Area: 18,292 km².
Mount Ishizuchi in Ehime at 1982m is the highest mountain on the island.
See also: Geography of Japan, List of regions in Japan