Abstract
In seismic areas of the 2004 Mid Niigata earthquake of Japan, the authors carried out questionnaire surveys on inhabitants' impression about performance of seismically isolated buildings. The questionnaire mainly deals with floor responses. And its items are concerned about the ability of evacuation action, feeling and aspects of floor vibration, valuation of seismically isolated buildings and so on. In the 6+ seismic intensity area, some inhabitants felt discomfort like seasickness during the earthquake and a few light or unstable interior things fell down or overturned on the floor. But on the whole, seismically isolated building effectively reduced floor responses and most of the inhabitants highly appreciated its performance.
