Medical tests started in the 1940s and 1950s, searching for the cause of the disease. Initially, it was expected to be lead poisoning due to the lead mining upstream. Only in 1955 did Dr. Ogino and his colleagues suspect cadmium as the cause of the disease. Ogino coined the term itai-itai disease.
Salix babylonica, commonly called weeping willow or Babylon weeping willow, is a medium to large deciduous tree with a stout trunk topped by a graceful broad-rounded crown of branches that sweep downward to the ground.It grows to 30-50â (sometimes to 60â) tall and as wide.It is native to China.alix babylonica, commonly called weeping willow or Babylon weeping willow, is a medium to large deciduous tree with a stout trunk topped by a graceful broad-rounded crown of branches that sweep downward to the ground. It grows to 30-50â (sometimes to 60â) tall and as wide. It is native to China.
The majestic, graceful willow tree is often found by a pond, stream or other body of water. While it prefers moist soil, weeping willows can do well in drier areas as long as watered regularly. Willow trees require a lot of room due to their size which includes a massive root system and sweeping round crown.This deciduous tree has green narrow leaves and yellow flowers that bloom during April and May.hile it prefers moist soil, weeping willows can do well in drier areas as long as watered regularly. Willow trees require a lot of room due to their size which includes a massive root system and sweeping round crown. This deciduous tree has green narrow leaves and yellow flowers that bloom during April and May.