The broadband strong motions by large magnitude subducting earthquakes need to be estimated accurately to promote rational and effective earthquake resistant design of large structures or plans for counter measures of seismic disaster in urban area. We simulated the broadband strong motions in the Tokyo metropolitan area during the great 1923 Kanto earthquake by hybrid method. The distribution of seismic intensity calculated from the simulated strong motions fits the distribution of ratio of collapsed houses during the Kanto earthquake. From this result, the simulated broadband strong motion time histories can be applied to the earthquake resistant design of structures and the plans for counter measures of seismic disaster.
