Honshu the economy along the northwestern Sea of Japan coast is largely based on fishing and agriculture. The island is linked to the other three major Japanese islands by a number of bridges and tunnels. Its climate is humid and mild. The island is roughly long and ranges from wide, and its total area is , 60% of the total area of Japan, making it slightly larger than Great Britain. Its land area has been increasing with land reclamation and coastal uplift in the north, but global sea level rise has diminished these effects. Honshu has of coastline. Mountainous and volcanic,
Bougainville Island Bougainville Island Bougainville Island is the main island of the Autonomous Region of Bougainville of Papua New Guinea. This region is also known as Bougainville Province or the North Solomons. Its land area is 9,300 km (3591 sq miles). The population of the province is 234,280 (2011 census), which includes the adjacent island of Buka and assorted outlying islands including the Carterets. Mount Balbi at 2,700 m is the highest point. Bougainville Island is the largest of the Solomon Islands archipelago, forming part of the Northern Solomon Islands, which is politically separate from the sovereign country also called Solomon Islands.