Showa Denko responded to the outbreak of Niigata Minamata disease in a similar way that Chisso had responded in Minamata : by attempting to discredit the researchers while proposing their own theory . The company issued information leaflets that rejected their wastewater as the cause of the disease and suggested the cause might have been an " agricultural chemical run-off " that entered the river after the 1964 Niigata earthquake
1964 Niigata earthquake
1964 Niigata earthquake
Niigata Minamata disease