House Without Windows in Yokohama by Takeshi Hosaka

In Yokohama, a house for a four-member family was built on a plot of 85m². The minimalist design by Japanese architect Takeshi Hosaka is most remarkable for the fact that the building has no windows, and all interior lighting is provided by a skylight ceiling. The plot is located in a densely built and very diverse environment of standalone family houses, but also ten-story residential and office buildings. The plot that was available only offered suitable top lighting. The entire design is strictly divided into a rectangular grid of 1.50 x 1.60 meters. The interior of the house consists of a single large two-story space divided approximately into two halves (living area and quiet zone). The bedrooms have walls only up to half of the light height, leaving the ceilings exposed. The ceiling of the house is provided by a wooden structure of 29 square skylights, into which bent white acrylic panels are set. To allow for even light distribution, there is an air gap between the roof and the ceiling finish. In summer, overheated air will be expelled here, and in winter, this gap will serve as a 'thermal buffer'.
“When one enters the house, there is suddenly so much light that it is hard to imagine being in such a confined and dark valley among the surrounding tall buildings. That is why we named our house 'Daylight House'. This takes into account not only the sun's rays but also the changes in light throughout the day from dawn to dusk and essentially also at night. 'Daylight House' offers a magnificent experience where you can observe the beauties of light for a full 24 hours.”