Many lessons were learned from Minamata and the investigation into the cause of the outbreak proceeded much more smoothly than it had in Minamata.
===Preiskava===V letih 1965 in 1966 so raziskovalci iz raziskovalne skupine univerze Kumamoto ( vzpostavljene za preiskavo prvotnega izbruha ) in dr Hajime HOSOKAWA (nekdanji predstojnik bolnišnice Chisso ) prinesli svoje bogate izkušnje iz Minamata in jih uporabili pri Niigata izbruhu.