This paper deals with the rebuilding of Tokyo from the late 1920s to 1930s after the land-readjustment following the Great Kanto Earthquake. The author analyzes the changes of architectures, ownership in both land and buildings, and residents in Okachimachi 3 Chome District and concludes as follows; 1. More than 70% of temporal buildings had been removed and reconstructed till 1935. Uniting lots, buildings came to have bigger sizes in average than before. 2. 0n the other hands residents, especially tenants, moved into and out from the district. Just 22.4% of households continued to live through the 30's.