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 tree can begin growing leaves in early March. A Weeping Willow Tree is one of the most cold hardy shade trees growing in almost every State, and can grow up to 8 feet in a single year. The Weeping Willow tree grows well near water, yet has some drought tolerance.The leaves of this tree are long and narrow, most between 2-1/2 and 6 inches long and 1/2 inch wide.he tree can begin growing leaves in early March. A Weeping Willow Tree is one of the most cold hardy shade trees growing in almost every State, and can grow up to 8 feet in a single year. The Weeping Willow tree grows well near water, yet has some drought tolerance.