Honshu (本州) is biggest of Japan's four main islands. It is around 1,300 kilometers long and comprises around 60% of Japan's area in square kilometers.
Formerly referred to as Hondo, the island is divided into five regions with 34 prefectures. The regions are Chugoku, Kansai, Chubu, Kanto, and Tohoku.
The 34 prefectures are:
Mount Fuji is located on Honshu. At over 3,700 meters tall, the active volcano's height makes Honshu the world's 7th tallest island. Honshu is a very seismically active area, containing many mountains and volcanoes. There are frequent earthquakes of varying intensities, one of the more memorable being the Great Kanto Quake of 1923 which damaged Tokyo.
Japan's longest river - the Shinano - cuts through central Honsu. Most of Japan's tea and silk comes from Honshu. Other products from this area include cotton, fruits, and vegetables. Most of the population of the island is located in the Kanto Plain - an area which includes Tokyo and its metropolitan area.