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is an island of the Japanese archipelago situated in the Korea Strait between the Japanese mainland and the Korean Peninsula.〔(MapQuest on Tsushima Island's coordinates. )〕〔(location of Tsushima. )〕〔https://en.wikipedia.org/wiki/Korea_Strait International name commonly used in English is Korea Strait〕 The main island of Tsushima was once a single island but was divided into two in 1671 by the Ōfunakoshiseto canal and into three in 1900 by the Manzekiseto canal. These canals were driven through isthmuses in the center of the island, creating North Tsushima Island (Kamijima) and South Tsushima Island (Shimojima). Tsushima also incorporates over 100 smaller islands (many tiny). The name Tsushima generally refers to all the islands collectively. The island group measures about by and has a population of about 34,000 as of 2013. The main islands (that is, the "North" and "South" islands, and the thin island that connects them) are the largest coherent satellite island group of Nagasaki Prefecture and the fourth largest in Japan (excluding Honshu, Kyushu, Shikoku and Hokkaido). The city of Tsushima lies on the Tsushima islands, and is divided into six boroughs.〔(Info on Tsushima Shi )〕 Changwon City in South Korea asserts ownership of the Island, calling it ''Daemado'' ((:te:ma.do); ), the Korean reading of the same characters as those used in the Japanese name ((日本語:對馬)). == Geography == Tsushima Island is located west of the Kanmon Strait at a latitude between Honshu and Kyushu of the Japanese mainland. The Tsushima Strait splits at the Tsushima Island Archipelago into two channels; the wider channel, closer to the mainland of Japan, is the Tsushima Strait. Ōfunakoshi-Seto and Manzeki-Seto, the two canals built in 1671 and 1900 respectively, connect the deep indentation of Asō Bay to the east side of the island. The archipelago comprises over 100 smaller islets in addition to the main island. Tsushima is the closest Japanese territory to the Korean Peninsula, lying approximately 50 km from Busan〔(【引用サイトリンク】title=Google Maps )〕 (Pusan). On a clear day, the hills and mountains of the Korean peninsula are visible from the higher elevations on the two northern mountains. The nearest Japanese port, Iki, situated on Iki Island within the Tsushima Basin, is also 50 km away.〔(【引用サイトリンク】title=Google Maps )〕 Tsushima Island and Iki Island contain the Iki–Tsushima Quasi-National Park,〔 designated as a nature preserve and protected from further development. Much of Tsushima (89%) is covered by natural vegetation and mountains.〔(Asahi.com article on Tsushima )〕 Tsushima Island has many mountains such as the Mt. Ohira, Mt. Yatate, Mt. Hokogatake, Mt. Koyasan, Mt. Ontake, Mt. Gogen.〔(Interactive Map of Tsushima Island, Japan )〕 The Japanese government administers Tsushima Island as a single entity despite the artificial waterways that have separated it into two islands. The northern area is known as Kamino-shima (上島), and the southern island as Shimono-shima (下島). Both sub-islands have a pair of mountains. Shimo-no-shima has Mount Yatate (矢立山), standing 649 m (2,130 ft) high,〔 (国土交通省国土地理院 九州地方測量部「長崎県山岳標高」 ) - Kyushu Regional Survay Department, Geographical Survay Institute, Ministry of Land, Infrastructure, Transport and Tourism in Japan〕 and Ariake-yama (有明山), at 558 m (1,831 ft) high.〔 Kami-no-shima has Mi-take (御嶽), 487 m (1,598 ft).〔 The two main sections of the island are now joined by a combination bridge and causeway.〔(Aerial view of the junction between the two islands of Tsushima Island )〕〔(Water level view of the junction between the two islands of Tsushima Island )〕 The island has a total area of 696.26 km2. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tsushima Island」の詳細全文を読む スポンサード リンク
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