Minamata Bay
Encyclopedia
Kyushu
is the third largest island of Japan and most southwesterly of its four main islands. Its alternate ancient names include , , and . The historical regional name is referred to Kyushu and its surrounding islands....
island, located in Kumamoto Prefecture
Kumamoto Prefecture
is a prefecture of Japan located on Kyushu Island. The capital is the city of Kumamoto.- History :Historically the area was called Higo Province; and the province was renamed Kumamoto during the Meiji Restoration. The creation of prefectures was part of the abolition of the feudal system...
, Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
. The bay is part of the larger Shiranui Sea which is sandwiched between the coast of the Kyūshū mainland and the off-lying islands of Kumamoto
Kumamoto Prefecture
is a prefecture of Japan located on Kyushu Island. The capital is the city of Kumamoto.- History :Historically the area was called Higo Province; and the province was renamed Kumamoto during the Meiji Restoration. The creation of prefectures was part of the abolition of the feudal system...
and Nagasaki
Nagasaki Prefecture
is a prefecture of Japan located on the island of Kyūshū. The capital is the city of Nagasaki.- History :Nagasaki Prefecture was created by merging of the western half of the former province of Hizen with the island provinces of Tsushima and Iki...
prefectures.
The coastline is rugged, with many inlets and coves which act as the spawning grounds of fish
Fish
Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups...
and shellfish
Shellfish
Shellfish is a culinary and fisheries term for exoskeleton-bearing aquatic invertebrates used as food, including various species of molluscs, crustaceans, and echinoderms. Although most kinds of shellfish are harvested from saltwater environments, some kinds are found only in freshwater...
. A great variety of creatures live in this area.
Minamata Bay was heavily polluted in the 1950s and 1960s by wastewater
Wastewater
Wastewater is any water that has been adversely affected in quality by anthropogenic influence. It comprises liquid waste discharged by domestic residences, commercial properties, industry, and/or agriculture and can encompass a wide range of potential contaminants and concentrations...
, mixed with mercury
Mercury (element)
Mercury is a chemical element with the symbol Hg and atomic number 80. It is also known as quicksilver or hydrargyrum...
dumped into Hyakken Harbour from the Chisso Corporation's factory in Minamata
Minamata, Kumamoto
is a city located in Kumamoto prefecture, Japan. It is on the west coast of Kyūshū. The city was founded on April 1, 1949.As of 2008, the city has an estimated population of 27,856 and the density of 171 persons per km²...
, particularly by methylmercury
Methylmercury
Methylmercury is an organometallic cation with the formula . It is a bioaccumulative environmental toxicant.-Structure:...
. The highly toxic compound bioaccumulated in fish and shellfish in the bay which, when eaten by the people living around the bay, gave rise to Minamata disease
Minamata disease
', sometimes referred to as , is a neurological syndrome caused by severe mercury poisoning. Symptoms include ataxia, numbness in the hands and feet, general muscle weakness, narrowing of the field of vision and damage to hearing and speech. In extreme cases, insanity, paralysis, coma, and death...
. More than 10,000 people were affected.
A memorial service was held at the Minamata Disease Municipal Museum on 1 May 2006 to mark 50 years since the official discovery of the disease. Despite bad weather the service was attended by over 600 people, including Chisso chairman Shunkichi Goto and Environment Minister
Ministry of the Environment (Japan)
The ' of Japan was formed in 2001 from the sub-cabinet level Environmental Agency established in 1971. The minister is a member of the Cabinet and is chosen by the Prime Minister, usually from the Diet., the current is Goshi Hosono...
Yuriko Koike
Yuriko Koike
is a Japanese politician, who was the Minister of Defense in the Cabinet of Prime Minister Shinzo Abe, but resigned August 27, 2007 after only 54 days in office...
.
The poisoning of Minamata Bay had a large impact on Japanese culture as well. Hayao Miyazaki used this event as inspiration to create his epic Manga (1982-1994) and later Anime Nausicaa of the Valley of the Wind (1984). According to Dani Cavallaro's book, The Anime Art of Hayao Miyazaki, "The Minamata Bay fish are unquestonably the real-life correlatives for the immensely and ingeniously adaptable fictitious plants portrayed in Miyazaki's film."