So the residents were outraged and on July 10, formed the Morita Village Association (later changed its name to the Morita Area Association), and to agree with them, on August 2, the Watarase-gawa River Mining Pollution Eradication Committee of Gunma Tomo Three Cities and Three Counties was formed again mainly by the peasants of three cities and three counties of Gunma Prefecture including Kiryu City, Ota City, Tatebayashi City, Nitta County, Yamada County and Oura County.
住民らが激怒し、7月10日、毛里田村期成同盟会（のちの毛里田地区期成同盟会）が結成され、これを受け、さらに8月2日、群馬県桐生市、太田市、館林市、新田郡、山田郡(群馬県)、邑楽郡の農民が中心となって群馬県東毛三市三郡渡良瀬川鉱毒根絶期成同盟会が再度結成される。