A case of Wood This small house in the town of Sayama, in Osaka, Japan, sits in a quiet neighborhood and was designed for a couple and their two-child by the Osaka-based firm,Coo Planning. Built of Wood,the residence is minimal with the needed space spread throughout three layers. A living room on the 2nd floor has the double ceiling height. A big pond is in the south , and A big window is being planned. Big nature is felt in the small house. It's small, but it's abundantly sensitive housing.