Detailed seismic intensity distribution from the 1923 Kanto earthquake was obtained in Chiba Prefecture, based on the reports by the Geological Survey of Japan. These reports summarized the number of damaged wooden houses not only on municipalities but also on village sections, and described other damages including toppling rate of tombstones. Therefore, we could determine the seismic intensities from the rate of collapsed wooden houses and of toppled tombstones at more than 500 points and make a detailed seismic intensity map in Chiba Prefecture. The results of the present study must be useful for predicting seismic intensity from future earthquakes in Chiba Prefecture and for the mitigation of earthquake damages.