In the same year, the residents formed the Watarase-gawa River Improvement Alliance in Gunma and submitted petitions to the Ministry of Home Affairs, asking improvement of Watarase-gawa River and cultivation of the source.
同年、渡良瀬川改修群馬期成同盟会が結成され、内務省に対して渡良瀬川の河川改修や水源地の涵養などを求める陳情が行われた。