With the distribution of the controversial My Number identification code only a few weeks away, hundreds of protesters marched through Tokyo's Shibuya district Saturday in a last-ditch effort to stop a program they say invades people's privacy.

Chanting "Stop My Number now!" and "No dangerous My Number card!" protesters called for postponement of the 12-digit number slated for mid-October. Organizers put the turnout at 400.

The government will start sending all residents in Japan, including non-Japanese, an identification number it says is intended to spare them the hassle of doing paperwork to handle administrative procedures.