Most civilians near Fukushima received about the same amount of radiation from the accident as they would from a single CT scan -- which is something doctors routinely order for millions of patients every year. The risk is negligible. There have been zero reported health impacts to date, and all serious predictions state that there will be no measurable increase in cancer rates in the general population. Even among many thousands of response workers, only about 150 received radiation doses in excess of normal limits, and the odds are against any of them getting cancer on account of the accident.
6 response/recovery workers have been killed by non-nuclear causes, such as falling equipment. There have been no other deaths due to the Fukushima meltdown. It's been an enormous distraction from the very devastating tsunami, which killed several times more people than every nuclear accident in history put together. Nuclear power is spectacularly, stupendously safe -- far and away the safest form of power we have, even safer on a deaths-per-TWhr basis than solar or wind power.
More info on radiation's impact on health:
Page on World-nuclear
In May 2013 UNSCEAR reported that "Radiation exposure following the nuclear accident at Fukushima Daiichi did not cause any immediate health effects. It is unlikely to be able to attribute any health effects in the future among the general public and the vast majority of workers." The only exception are the 146 emergency workers that received radiation doses of over 100 mSv during the crisis. Thyroid doses in children were significantly lower than from the Chernobyl accident. Some 160,000 people were evacuated as a precautionary measure, and prolonging the evacuation resulted in the deaths of about 1100 of them due to stress, and some due to disruption of medical and social welfare facilities. The highest internal radioactivity from ingestion was 12 kBq, some 1000 times less than the level causing adverse health effects at Goiania (see below).
Certainly the main radiation exposure was to workers on site, and the 146 with doses over 100 mSv will be monitored closely for "potential late radiation-related health effects at an individual level." Six of them had received over 250 mSv – the limit set for emergency workers there, apparently due to inhaling iodine-131 fume early on. There were around 250 workers on site each day.