The renovation of a fifty-year-old traditional Japanese house. A one-room space was created by removing the walls from the existing plan that was broken up into small rooms, leaving only the necessary columns. The ceiling forms a curved surface from the eaves to below the rafters, on both the long and short sides of the building. This is finished in white glossy acrylic emulsion paint, which softly reflects and spreads light around the perimeter of the building. Omitting the wall above the nageshi (intermediate tie beams below ceiling), connecting the upper and lower spaces, a new spatial relation between the floor and ceiling is formed.