The misleading information spreads into the society, the people move on the basis of it. This mechanism, what I call “rumor disaster” is examined in this note. Authorities, specialists, intellectuals, and so on, oftentimes, might take part in this process. In this note, the spent fuel storage pool of Tokyo Electric Power Fukushima Daiichi N.P.P. Unit 4 is the case used for discussion because there are relatively abundant materials and the resulting impact to the society is very big.

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