In the year 1987, I designed a small house in the old town of Osaka where prewar terrace houses still lined the streets and factories and warehouses were common. A two level steel structure, 2.58‚ wide and 16.2m depth, was inserted into the site and a courtyard was created in the middle. The flooring for the first floor was white ceramic pavement, both inside and outside, so that once opening the window fully, the interior and exterior space became integrated.
For this project, in order to minimize construction work at the site, as much as possible, the structure and other elements were prefabricated in a factory. The structure was made by placing four prefabricated rectangular frames made of I-beams, evenly spaced from the front to the back, and an underground concrete slab along with the first floor flooring, which was cast at the same time. Then, factory-made cement panels and aluminum sashes were installed as a curtain wall.