On March 11, 2011, the east coast of Japan was struck by a major earthquake. TRight after the earthquake and tsunami, three nuclear reactors lost power, causing a core meltdown, and the release of radioactive materials into the atmosphere. The disaster and following the nuclear power plant accident is unprecedented in history. The crisis communication especially about scientific information was abundantly mixed. In this article, I would like to review the communication between people and the government, providing mass media and how people seeking the information. In crisis situation, people don't know what they want to know but they want to know something about their concern. In the crisis, people utilize the internet especially social network sites. That is interactive media. And a new NPO, Science Media Center Japan provide scientific information rapidly. The Q&A style information that was provided by SMCJ gained mass acceptance.