Koji Tsutsui Architect & Associates design a house for an industrial designer in a quiet residential area in Tokyo. It was required that this house be not only private in nature but also in coexistence with the client’s feelings for his life’s work, the industrial design. The client gave Koji Tsutsui several requirements including an open atelier to outside; a study with a view to the car; a living/ dining space where his treasured industrial products will be displayed; and completely separated guest room and bed room for sleep. On the other hand, considering that the act of thinking about design is part of the client’s daily life, the division between designing and living needed to be as ambiguous as possible. Each room had to be divided while also softly connecting them together at the same time.