. >> earlier michio kijima spoke with miho fukunaga also covering the accident. >> miho, tell us about the difference between the risks faced by a-bomb survivors and people in fukushima. >> yes the people were exposed to extremely high levels of radiation as a result of the atomic bombings. it happened within seconds. the concern in fukushima has been about the long-term risks of exposure because radioactive materials continue to leak from the nuclear plant. many a-bomb victims died as a result of high-level acute radiation exposure. among those who survived, the effects continue to this day. one day after the accident at fukushima daiichi, the japanese government instructed people to evacuate from areas within a 20-kilometer radius of the plant. >> how, how did those measures protect people from radiation exposure? >> the national government at fukushima prefecture say they have confirmed no cases to date of people exposed to levels of radiation that would immediately affect their health, but experts continue to argue about the safety of low-level contamination. so deep-seated concern