In what was at once a preventative and punitive measure as well as an effort by the Shogun to clean up Edo, the seat of his power, the homeless who were deemed potential criminals were rounded up and sent to the Sado gold mine on Sadoga-shima Island and put to work as laborers there.
その予防対策として、懲罰としての意味合いや将軍のお膝元である江戸浄化のため、犯罪者の予備軍になりえる無宿者を捕らえて佐渡島の佐渡金山に送り、彼らを人足として使役しようとするものである。