Source: Report of Japanese Government to the IAEA Ministerial Conference on Nuclear Safety - The Accident at TEPCO's Fukushima Nuclear Power Stations -
> on March 16, the Director-General of the Nuclear Emergency Response Local Headquarters instructed the Governor of Fukushima Prefecture and others to have residents take stable iodine when evacuating from within the 20 km radius of the nuclear power plant
...
> But as a matter of fact **no residents took stable iodine based on this instruction** because the evacuation had already been completed at the time the instruction was issued.