1965 Minamata disease outbreak in Niigata Prefecture

From 1964 at the earliest to the 1970s at the latest, an outbreak of Minamata disease (水俣病, Minamata-byō) — a neurological syndrome caused by severe mercury poisoning — occurred in Niigata Prefecture, Japan. This would be the second outbreak of Minamata disease, the first occurring in its namesake: Minamata — a fishing village in Kumamoto Prefecture.