This study is concerned with describing the changing concepts of space utilization in Japanese house design and the cultural forces producing the changes. Sources of information include literature spanning approximately one hundred years, a Japanese student of interior design, and-the Japanese Trade Commission in Dallas, Texas. A description of concepts of space design that were very stable for centuries in the Japanese house. The changes in architecture following World War II, and a contemporary house design by a noted Japanese architect are related to concurrent religious, philosophical, and economic forces. The influence of western culture upon Japanese life-style and design solutions to space problems is either indicated or inferred.