Map of the Sea of Japan (East sea), showing the basin

The Tsushima Basin (Japanese:対馬海盆) or Ulleung Basin (Korean:울릉분지) is an oceanic basin located where the Sea of Japan (East Sea) meets the Korea Strait. It lies immediately south of Ulleung-do and Dokdo, in the eastern end of the South Korean EEZ and the western end of the Japanese EEZ. Image File history File links Download high resolution version (720x764, 279 KB) Sea of Korea Map. ... Image File history File links Download high resolution version (720x764, 279 KB) Sea of Korea Map. ... An oceanic basin is anywhere on Earth that is covered by seawater. ... The Sea of Japan (East Sea) is a marginal sea of the western Pacific Ocean. ... The Korea Strait is a sea passage between the East China Sea and the Sea of Japan (East Sea). ... Ulleung-do is a Korean island in the Sea of Japan (East Sea). ... Dokdo are islets in the Sea of Japan (East Sea) currently controlled and administered by South Korea, but claimed by Japan (where they are known as Takeshima). ... South Korea, officially the Republic of Korea (ROK; Korean: Daehan Minguk (Hangul: 대한 민국; Hanja: 大韓民國)), is a country in East Asia, covering the southern half of the Korean Peninsula. ... In international maritime law, an exclusive economic zone (EEZ) is a seazone extending from a states coast over which the state has special rights over the exploration and use of marine resources. ...

In 1978, the Japanese government registered the name Tsushima Basin with the International Hydrographic Bureau, although not accepted as a standard. The International Hydrographic Organization (IHO) is an intergovernmental international organization established in 1921. ...

The first exploratory drilling for gas was in 1972, but gas discoveries have drawn regional interest since the late 80s. The first commercial gas discovery was reported in 1998. Nine of 15 exploratory wells have contained gas, a rate indicating high potential prospects. [1]

The East Korean Warm Current, Ulleung Warm Eddy, and Offshore Branch interact within this basin. [2]

A feature of the southwestern Sea of Japan is a deep, developing continental shelf. The eastern Oki Islands, a big ridge of three rows lines up in parallel to the Japanese archipelago, and it connects with a Yamato Basin which has expanded from Oki Islands and offshore of the Tohoku region to the south in between those. The vast Tsushima Basin has extended on the tip of the Oki offshore that expands from Oki Islands on the north side.  Sediment  Rock  Mantle The continental shelf is the extended perimeter of each continent, which is covered during interglacial periods such as the current epoch by relatively shallow seas (known as shelf seas) andbbccvcnccccccccccccccccccccccccvvvvvvvvvvvvvvcggggggggggggggggyutu7ti8yukiyuiyutuiyuiytui gulfs. ... Oki (隠岐) is the name of a group of islands (隠岐諸島 Oki shotō) in the Sea of Japan, 40 to 80 km from the coast of Honshu. ... Tohoku region, Japan The Tōhoku region (東北地方; Tōhoku-chihō) is a geographical area of Japan. ...

External links

• Current velocities graphs
• Petroleum geology map