Agano River organic mercury poisoning incident - Agano River organic mercury poisoning incident

Japanese: 阿賀野川有機水銀中毒事件 - あがのがわゆうきすいぎんちゅうどくじけん
Agano River organic mercury poisoning incident - Agano River organic mercury poisoning incident
It is generally known as the Niigata Minamata Disease Incident. In June 1965, Tadao Tsubaki of Niigata University announced that Minamata disease patients were occurring in large numbers among fishermen living in the downstream basin of the Agano River in Niigata Prefecture. The cause was said to be methylmercury compounds in wastewater discharged from the acetaldehyde manufacturing process at Showa Denko's Kanose Factory, located some 60 km upstream from the river's mouth. However, Showa Denko fought back, claiming that mercury pesticides stored in a warehouse at Niigata Port Wharf had been swept away by the tsunami during the Niigata earthquake, entering the Shinano River and the Sea of ​​Japan, and polluting the downstream of the Agano River with a saltwater wedge. In June 1967, patients filed Japan's first full-scale pollution lawsuit against Showa Denko.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
一般には新潟水俣病(みなまたびよう)事件と呼ばれている。1965年6月,新潟大学椿忠雄が新潟県下の阿賀野川下流流域に居住する漁民に水俣病患者が集団的に発生していると公表した。原因は,河口から六十数km上流にある昭和電工鹿瀬(かのせ)工場のアセトアルデヒド製造工程から流された排水中のメチル水銀化合物によるものであったが,昭和電工は,新潟地震の際,新潟港埠頭(ふとう)倉庫に保管されていた水銀農薬が津波に流され,信濃川から日本海に出,塩水くさびによって阿賀野川下流を汚染したとして抗争したため,67年6月,患者が昭和電工を被告とする日本初の本格的公害裁判を提起した。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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