This study predicted the earthquake damage in Nagano city when the Shinanogawa-fault lines has been moved. This fault lines are located in the north area of Nagano Prefecture and serious damages in Nagano city is expected if the earthquake occurs. First, an assumed Magnitude was decided. Second, earthquake motions while shifting focal area along Shinanogawa-fault lines were simulated. Finally, we compare each focal area which is the most dangerous when the earthquake occurs by using Population Exposure to Seismic Intensity as an indicator.