Located in Tokyo, Japan, this house has been designed around a central spiral staircase which enables inhabitants and guests to move through the building with ease, going up and down and from room to room at the same time. The total floor area of the design is 144 sqm, with the ground floor acting as a garage and workspace, the second as a living and dining space, and the third being private with the master bedroom. All the necessary, but perhaps not so nice rooms (such as the toilet and storage) have been placed on the north side of the house where they face a highly trafficked road, allowing the other living spaces to be relatively quiet.