The shortage of land in Japan makes compact house design more and more popular. Yasuhiro Yamashita, the architect behind Atelier Tekuto, has shown his sight of compact house in this Lucky Drops project. It was built with extremely tough limitations – it had to be compact and yet comfortable, look good and provide maximum space for living. Most of the living areas are buried underground since the 0.5 boundary rule is not applicable there. Specially treated stainless steel sheets are used for the basement walls to lower the cost and more importantly save space on the wall thickness. The visible part of the house has translucent walls, letting a lot of sunlight in.