NEW : They were placed there under a security alliance after Japan was defeated in World War II and forced to renounce its right to a military . Japan may send high - ranking officials to Okinawa . Japan 's prime minister calls alleged assault on girl ` ` unforgivable '' Authorities have not charged anyone with crime .
NEW : Japan may send high - ranking officials to Okinawa . Japan 's prime minister calls alleged assault on girl ` ` unforgivable '' Authorities have not charged anyone with crime .