Knowra Itai-itai disease Itai-itai disease Itai-itai disease is a painful illness caused by chronic cadmium exposure, characterized by kidney damage and severe bone weakness. It was first identified in Toyama Prefecture, Japan.
Cadmium poisoning : Illness caused by harmful exposure to cadmium, a toxic metal that can damage the kidneys, bones, and other organs. Chronic cadmium poisoning is the underlying cause of Itai-itai disease.
Jinzū River : A river in Toyama Prefecture, Japan, flowing through an area affected by historical mining pollution. Its contaminated water and sediments carried cadmium into local rice fields.
Japanese pollution-related diseases : A group of major illnesses linked to industrial pollution in Japan, including Minamata disease and Itai-itai disease. Itai-itai disease became one of Japan’s emblematic pollution-related illnesses.
Itai-itai disease in Toyama : The historical outbreak of cadmium-related kidney and bone disease among residents of the Jinzū River basin in Toyama, Japan. This outbreak supplied the defining cases behind the disease’s name and recognition.
Cadmium : A soft, bluish-white toxic metal used in batteries, pigments, and metal coatings. This metal accumulated in the contaminated environment and caused the disease.
Kamioka Mine : A major mine in Gifu Prefecture, Japan, historically associated with cadmium and other metal pollution in the Jinzū River basin. Mining discharges from the basin’s industrial activity contaminated the river system.
Minamata disease : A neurological disorder caused by methylmercury poisoning, first recognized in Minamata, Japan. It was another major Japanese pollution disease, but arose from mercury rather than cadmium.
Cadmium-contaminated rice fields in Toyama : Rice-growing land in Toyama polluted by cadmium carried through irrigation water from the Jinzū River basin. These fields connected industrial contamination to chronic dietary exposure.
Proximal tubule : The kidney nephron segment that reabsorbs most filtered nutrients, ions, and water. Cadmium injury to this segment impairs kidney function and disrupts mineral balance.
Toyama Prefecture : A prefecture on Japan’s main island of Honshu, facing the Sea of Japan. The first recognized cases arose in communities along the Jinzū River.
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