In a possible first for Japan, the city of Sakai, Osaka Prefecture, will urge convenience stores to cover up adult magazines to keep them out of sight of children, a municipal official said Wednesday.

The city hopes to start the initiative next month, which will deal with explicit magazines and manga designated by the prefecture as harmful to children under 18.

A Sakai official said the municipal government believes there is a high degree of "overexposure" to racy material by youngsters.