This house was designed in the city of Isumi in Chiba, Japan. It was inspired by the profile of the mountains surrounding the site. The details have a close relationship to the main structure. The partitions, fittings, furniture, lighting and plumbing are all attached to the timber component of the hybrid steel-timber structure. This simplicity guarantees flexibility for any changes the user may wish to make in the future. Environmental effects are also an important feature. The long eaves provide shade from heat and light and the Low-E glass and the wooden sashes give excellent thermal insulation. The trombe walls hold and radiate heat.