水俣病
The definition of Minamata disease was not clear at the time, and the level of contamination in Japan's case of Minamata disease was much more serious and lethal than the ones in Canada. Also, the symptoms of Minamata disease are similar to alcoholic inebriation, including loss of coordination and concentration and body tremors. Public awareness of the problem grew during the 1970s. The federal government paid $4.4 million ($ today) to Grassy Narrows for social service and economic development on July 27, 1984. The federal government has paid more than $9 million for compensation to the First Nations affected by the mercury contamination.