It is said that the spread of stainless steel sinks is the eyeball of apartment housing that began in 1956 by Japan Housing Corporation. It is Japanese Housing and Urban Development Corporation who contributed to the nation wide spread of stainless steel sinks. This research is verified based on the patent office's data base “SHINKENCHIKU” and “Industrial arts news” of which contents of patent fillings on kitchens prior to the existence of stainless steel sinks. Such verification is an essential fact, serving as a prime example of technical improvement in post war days, much related to mass production.
