[Kyodo News] Tokyo police on Friday asked four Internet site operators to delete so-called ranking sites that could guide Web surfers to child pornography.The four operators, based in Tokyo and Kanagawa and Hyogo prefectures, manage 14 Web sites that rank child pornography sites according to hit counts.
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http://www.japantoday.com/category/crime/view/4-internet-sit-operators-asked-to-delete-child-porn-ranking-sites