The National Police Agency set up a team Thursday to discuss creation of a system under which police would be able to keep track of convicted sex criminals.
Politicians have called for police to take steps to prevent former sex criminals from committing further crimes in the wake of the murder of an elementary school girl in Nara Prefecture in November.
Kaoru Kobayashi, 36, who had been arrested in the past for molesting girls and served prison time for trying to kill one, was arrested in late December in connection with the kidnap-murder of Kaede Ariyama, 7.