Japanese studio Takeshi Hosaka Architects has recently completed the Daylight House project.

Located in Yokohama, Japan, this contemporary home with no window is equipped with 29 skylights to bring in natural light.

Daylight House by Takeshi Hosaka Architects:

“This is a house in which residents live under natural lighting from the sky.


The building was structured by laying a basic grid (approx. 1500mmx1600mm) over the site, and using a the volume of a single high-ceilinged room with a bedroom, kids’ room and study partitioned off using fittings approximately half the height of the ceiling. The expanse of the entire ceiling can be felt from any room.

Light from 29 skylights (approx 700mm square) installed in the roof illuminate the room as soft light diffused through the curved acrylic ceiling plates. The direct light falling from the clear square skylights cuts a distorted square image on the curved acrylic ceiling. At the same time, the entire curved acrylic ceiling is uniformly lit with white light by selecting the distance between the skylights and the curved acrylic ceiling, their size, the color of the acrylic and the color of the interior panels after studying models and mockups to achieve the desired effect. There is an air space between the acrylic surface and the roof, and forced air is used to eject air heated by the sun in summer out of the building, while movement of the air is stopped in winter to use the air layer as a thermal buffer to ensure the thermal environment indoors is stable.

Upon entering the building, there is so much light from the sky that it is hard to believe that the site is nested in a dark valley created by buildings. This house was named “Daylight House.” Daylight does not simply indicate light from the sun, but refers to the beautiful light throughout the day. The day begins with the rising sun, which then falls and sets, followed by the rising moon which gradually wanes until it is replaced by the rising sun the next day. The house provides a rich experience of the beauty of the light over 24 hours.”

Photos by: Koji Fudji / Nacasa & Partners Inc.