The movement against the mining pollution was gradually weakened due to the closure of Yanaka Village and the decrease of floods as the results of the large-scale constructions along Watarase-gawa River, and especially after 1902 when there was a good harvest in the damaged areas including Ashikaga County, Yanada County, Aso County, Shimotsuga County, Oura County, the movement became very weak.
鉱毒反対運動は、谷中村の廃村や、渡良瀬川の大工事による洪水の減少などによりしだいに弱まり、特に1902年以降、足利郡、梁田郡、安蘇郡、下都賀郡、邑楽郡の鉱毒被害地が豊作になると弱体化した。