In this period, the movement was led mainly by the Morita Village Association (later changed its name to the Morita Area Association) which had been formed by the residents of the most damaged area.
この時期の鉱毒反対運動は、最大の被害地、毛里田村期成同盟会（のちの毛里田地区期成同盟会）が活動の中心となった。