That started with heavy social criticism toward some rental comics ("Ninja Bugeicho" by Sanpei SHIRATO and other comics were taken up as harmful books by newspapers and PTA).
それは一部の貸本漫画への大きな社会的な批判に始まる（白土三平の忍者武芸帳を筆頭に有害図書問題として新聞・PTAなどに取り上げられた）。