Maximizing Space Through Original Layout: IS House in Japan

Yo Yamagata Architects completed the design of a three-level residence located in Saitama,Japan, The design team managed to maximize the space (54.98  square meters) and create functional interiors filled with natural light. Three major components make up the structure of the building. The first is a buffer zone, an inspiring indoor-outdoor boundary consisting of a small courtyard, a terrace, and outside room, all partially hidden from the street with the help of wooden louvers.

Reference: http://freshome.com/2013/05/21/original-layout-maximizing-space-in-modern-japanese-residence/