Honshu - Geography

Geography

The island is roughly 1,300 kilometres (810 mi) long and ranges from 50 to 230 km (31 to 140 mi) wide, and its total area is 227,962.59 km2 (88,016.85 sq mi), 60% of the total area of Japan. It is larger than Great Britain, and slightly larger than the American state of Minnesota. Its area has been expanding with land reclamation and coastal uplift in the north, but global sea level rise has diminished these effects. Honshu has 5,450 kilometres (3,386 mi) of coastline.

Mountainous and volcanic, Honshu has frequent earthquakes (the Great Kantō earthquake heavily damaged Tokyo in September 1923, and the earthquake of March 2011 moved the northeastern part of the island by varying amounts of as much as 5.3 m (17 ft) while causing devastating tsunamis); the highest peak is the active volcano Mount Fuji at 3,776 m (12,388 ft), which makes it the world's 7th highest island. There are many rivers, including the Shinano River, Japan's longest. The climate is temperate, but has marked difference between the eastern or southern (Pacific or Inland Sea coast) side, and the western or northern (Sea of Japan coast) side. A mountain range runs along the length of Honshu from end to end. In addition to Mt. Fuji, the Japanese Alps are a feature of Honshu.

Honshu is connected to the islands of Hokkaido, Kyushu and Shikoku by tunnels or bridges. Three new bridge systems have been built across the islands of the Inland Sea between Honshu and Shikoku (Akashi Kaikyō Bridge and the Ōnaruto Bridge; Shin-Onomichi Bridge, Innoshima Bridge, Ikuchi Bridge, Tatara Bridge, Ōmishima Bridge, Hakata-Ōshima Bridges, and the Kurushima-Kaikyo Bridge; Shimotsui-Seto Bridge, Hitsuishijima Bridge, Iwakurojima Bridge, Yoshima Bridge, Kita Bisan-Seto Bridge, and the Minami Bisan-Seto Bridge), and the Seikan Tunnel connects Honshu with Hokkaido.