This house, built on a hill with a breathtaking view on the sea Seto, is a project of architect studio Kazunori Fujimoto Architect. The initial idea of this project was to show, how is it possible to interconnect exterior and interior and bring in the nature. An unusual element is ventilation; air can flow across the house thanks to the gaps that mediate the sea view with an opposite view on the mountains. Concave roofs catch the eye at first sight, they evoke the impression of the expansion of space. These roofs are made of concrete panels composed of a single layer 120mm thick. The house is light, airy, simple and its construction is based on a reinforced concrete frame. Although the space is simple, its beauty is neatness of the lines and materials.