An interior renovation of an apartment residence in Tokyo. All the elements including entrance, kitchen, desk and bath and the existing structural-wall are inside the wall cabinet system in a fixed distance of 200, 400 and 600 in the horizontal direction. The space between those functions are utilized as storage, shelves, desk and sun-room to be multi-functional. Depends on which panel to activate, the space can become a living room, dining room, bedroom or study room. The design archived an integration of different spatial usages, even the space is extremely limited.