Island (pop., 2001 est.: 102,681,000), Japan.
The largest of the four main islands of Japan, its coastline extends 6,266 mi (10,084 km); it has an area of 87,992 sq mi (227,898 sq km). It is regarded as the Japanese mainland, and much of the country's early history took place in its southwestern region. Honshu's Pacific coast is the country's main economic centre, lined with the metropolitan areas of Tokyo - Yokohama , Nagoya , and Ōsaka - Kōbe . Honshu contains Japan's tallest mountain, Mount Fuji , and its largest lake, Lake Biwa .