Staff writer

With the removal of a loophole that made Japan the center of child pornography for Internet pedophiles worldwide, police in Japan now face the daunting task of finding, identifying and nabbing offenders.

Long before the law against child prostitution and pornography went into effect Monday, child pornography Web sites went "underground," said Yutaka Iimori, director of Cyber Angels' Japan division, an Internet watchdog group. "You won't find anything by searching for 'kiddie porn' on Yahoo."