Minamata disease (Japanese: 水俣病, Hepburn: Minamata-byō), sometimes referred to as Chisso-Minamata disease (チッソ水俣病, Chisso-Minamata-byō), is a neurological disease caused by severe mercury poisoning. Signs and symptoms include ataxia, numbness in the hands and feet, general muscle weakness, loss of peripheral vision, and damage to hearing and speech. [Source: Wikipedia 
]
