A brief history of architectural planning research in Japan

[...]Nishiyama pointed out that in most of these housings, sleeping and eating occurred in the same room, and advocated that bedrooms and dining rooms must be separated as a minimum requirement for ordinary living, even in small housings. [...]the 51C Type realized two ideas, namely "dining-bedroom separation" and "Bedroom separation (separation of parents' and children's bedrooms),” in a very limited floor area of 35 m2. [...]the goal of architectural planning research is to design buildings not only from the experiences of architects but also from empirical research data.