Dōjunkai ( '' shinjitai '' : , '' kyūjitai '' : ) was a corporation set up a year after the 1923 Kantō earthquake to provide reinforced concrete ( and thus earthquake - and fire-resistant ) collective housing in the Tokyo area . Its formal name was '' Zaidan-hōjin Dōjunkai '' ( ) , i.e. the Dōjunkai corporation . The suffix '' kai '' means organization , and '' dōjun '' was a term coined to suggest the spread of the nutritious benefit of the water of river and sea . It was overseen by the Home Ministry
1923 Kantō earthquake
1923 Great Kantō earthquake
Dōjunkai