Dojunkai-Foundation was established in 1923 in order to supply public housings and to accomplish various social policies for the sufferers from the Kanto Earthquake. The first project practically done by this Foundation is to build 11 housing estates which was made up with 3,270 wooden terraced houses named Ordinary-style Housing Estates. These Policies and Methods are analyzed in this paper. In this survey, three critical findings have been established. The first is that the Ordinary-style Housing Estates were the first practice to design residential estates comprehensively in this century in Japan. The second is that the methods and policies in these projects to design residential neighborhoods, special structure, public open-space and all other residential space, was critically important as the origin of urban design of housing estates. The third is that these design policies had been affected by European ones especially R. Uwin's ideas.