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.
Willow is deciduous tree which belongs to the family Salicaceae. This plant originates from China, but it can be found throughout the northern hemisphere (Europe, Asia and North America).Willow inhabits temperate areas that provide enough moisture and direct sunlight.illow trees have elongated leaves that are green on the upper side and whitish on the bottom side. Color of the leaves changes seasonally. Leaves turn from green to yellow in the autumn. Willow is deciduous plant, which means that it sheds its leaves each winter. Willow has extremely strong and well developed root.