Sado (佐渡市 Sado-shi) is a city located on Sado Island (佐渡島 or 佐渡ヶ島, both Sadogashima) in the Chūbu region of Niigata Prefecture, Japan. Since 2004 the city has comprised the entire island, although not all of its total area of 855.26 km2 is urbanized. Sado is the sixth largest island of Japan in area following Okinawa Island and excluding the Northern territories.
The island consists of two parallel mountain ranges running roughly Southwest-Northeast, enclosing a central plain. The Ōsado (大佐渡) range, in the North, is slightly higher, with peaks of Mount Kinpoku (金北山), the highest point of the island at 1,172 m, Mount Myōken, and Mount Donden. Kosado (小佐渡) range in the South faces the Honshū coast. (Wikipedia)
