"For players aged 18 and older" proclaim the labels on some of the most popular and violent computer and video games on the market -- and children are snapping them up as never before.

Frustrated at being ignored, Japan's sole computer game watchdog is ready to slap new warnings on games beginning in June.

The Computer Entertainment Rating Organization, a nonprofit entity, said Monday it will place an array of tiny icons on certain game packages, warning potential users of sexual or violent content. This way, both adults and children know what they are really buying.