Via @designboom, a three-story house on a narrow site in Osaka, Japan. "The third floor is manipulated to provide four void spaces to provide sunlight to the levels below. Featuring a pivoted wall partition, the voids are read as geometrical cuts in the floor slab. The resulting height difference gives the interior a larger and open sense of space." More at Shogo Aratani Architect & Associates. Photo: Yutaka Kinumaki.