Sagami Bay

Sagami Bay (相模湾, Sagami-wan, also known as the Sagami Gulf or Sagami Sea) lies south of Kanagawa Prefecture in Honshu, central Japan, contained within the scope of the Miura Peninsula, in Kanagawa, to the east, the Izu Peninsula, in Shizuoka Prefecture, to the west, and the Shōnan coastline to the north, while the island of Izu Ōshima marks the southern extent of the bay. It lies approximately 40 kilometres (25 mi) southwest of the capital, Tokyo. Cities on the bay include Odawara, Chigasaki, Fujisawa, Hiratsuka, Itō, and Kamakura.

Cape Iro
Cape Manazuru
Cape Turugi
Location

History
Viewed from Miura Peninsula.

The epicenter of the Great Kantō earthquake in 1923 was deep beneath Izu Ōshima Island in Sagami Bay. It devastated Tokyo, the port city of Yokohama, and the surrounding prefectures of Chiba, Kanagawa, and Shizuoka, and caused widespread damage throughout the Kantō region.[1] The shallow nature of the seabed on the north of the bay, and the funnelling effect of tsunami and typhoon wave energy, contributed to certain parts of the Shonan coast having suffered considerable damage, including the destruction of the Kōtoku-in temple housing the Great Buddha, or Daibutsu during the massive tsunami of 1498.[2]

Natural environment

A branch of the warm Kuroshio Current warms the bay, allowing it to host marine organisms typical of more southerly regions and giving a mild climate to the land bordering it. The maximum depth of Sagami Bay is about 1500 meters.

Organisms from sub-arctic regions are advected into the bay by intrusions of the Oyashio Current resulting in very high biodiversity.[3] It is the major study site for research programs at the University of Tokyo (ORI) and the Japan Agency for Marine-Earth Science and Technology (JAMSTEC).

In 2004, soil samples from Sagami Bay were found to contain radioactive contamination from the Bikini Atoll nuclear tests that took place from 1946 to 1958.[4]

Sagami Bay as seen from Mt. Komagatake (April 2008).

The Hikiji River and Sakai River flow into the bay.

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References
  1. Hammer, Joshua (2006). Yokohama Burning: the Deadly 1923 Earthquake and Fire that Helped Forge the Path to World War II. Free Press. p. 278. ISBN 978-0743264655.
  2. Kamio, Kenji; Willson, Heather (2008). An English Guide to Kamakura's Temples and Shrines. pp. 143, 144. ISBN 978-4-8461-0811-3.
  3. CJO – Abstract – Biodiversity in midwater cnidarians and ctenophores: submersible-based results from deep-water bays in the Japan Sea and north-western Pacific
  4. SEPA Archived 2004-08-05 at the Wayback Machine

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