RESUMO
Public opinion on the application of nuclear technology and radiation could change when a nuclear related event occurs. Japan Atomic Energy Relations Organization has tracked its variation through a nationwide opinion survey in Japan by almost the same way every year since FY 2006. We can identify a continuous long-term fluctuation of Japanese opinion before and after the TEPCO Fukushima Daiichi nuclear disaster using the data. In this study we focused on the trends of public opinion for nuclear energy, impressions and knowledge on radiation, and zero-risk request. For example, radiation can be recognised that it is dangerous and complicated matter by Japanese public regardless of that accident. However, a big change of opinions on radiation was shown on the impression for the word of 'Useful' between before and after the accident.