The 2011 off the Pacific coast of Tohoku Earthquake triggered liquefaction of soil in wide areas. In particular, a number of damaged houses were found in the land reclamation areas of the Kanto retion. Some residents living in houses tilted by liqufaction complained of health disorders. We report the result of questionnaire survey of residents in Mihama Ward, Chiba City, about the characteristics of their house, earthquake damage, health disturbances, and so on. Based on the survey data, we construct probability models of health disturbance with respect to house tilt angle investigated by the local government for the certificate of damage. The probability of health disturbance exceeded 50% when the tilt angle was larger than approximately 0.013 rad.
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