"A house where I can feel the sky." In the crowded environment of Tokyo, our answer was to increase the ambient light. The clear sky in the cool morning; the bright sunlight in summer; the deep blue sky in twilight; the drops of water after rain The sky shows many and various behaviors, changing every moment, repeating images in the mirror that expand toward infinity. At one moment the light becomes a complex pattern on the wall; on another moment the sky is colored like the bottom of the sea. The message from the sky in each moment is enhanced and becomes tangible to us. This house is the filter to abstract the sky.