page_title: Sado, Niigata
section_title: Geography
hierarchical_section_title: Sado, Niigata / Geography
caption_attribution_description: English: View of Sadogashima island (Niigata, Japan). Français&#160;: Vue de l'île Sadogashima (Niigata, Japon). 日本語: 佐渡島の景観.
context_page_description: Sado is a city located on Sado Island in Niigata Prefecture, Japan. Since 2004, the city has comprised the entire island, although not all of its total area is urbanized. Sado is the sixth largest island of Japan in area following the four main islands and Okinawa Island.
  As of May 1, 2017, the city has an estimated population of 55,474, and a population density of 64.8 persons per km². The total area is 855.26 km².
context_section_description: 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 metres (3,845 ft), Mount Kongō, Mount Myōken, and Mount Donden. Kosado (小佐渡) range in the south faces the Honshu coast. The highest point in Kosado is Ōjiyama (大地山) at 645 m.
  The plain in between is called Kuninaka (国中) and is the most populated area. The Kuninaka plain opens on its eastern side onto Ryōtsu Bay (両津湾), and on its western side onto Mano Bay (真野湾), where the longest river, Kokufugawa (国府川, also read Konogawa) reaches the sea.
  The island has a symmetrical shape. Lake Kamo (加茂湖), on the eastern side of Kuninaka, is filled with salt water, and is a growing place for oysters.
caption: View of the coast of Sado
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