A movement is spreading across Japan to train parents to be more Internet-savvy when it comes to protecting their children from harmful sites, after the enactment of a new law this summer.

The Diet passed a bill in June aimed at controlling Web sites considered harmful to children. The law obliges Internet service providers and cell phone operators to offer filtering services to prevent people under the age of 18 from browsing such material.

But the law has been criticized for failing to cover all sites deemed harmful to minors.