story 4 unitwood-construction apartment located in Tokyo suburb, has kip?tchen, bath, storage, utilities and necessary structural wall length, all located in the building core, it achieves a superior sound insulation among units as well as a freedom of locating large openings that is impossible in a conventional 2 story wood-construction. Each unit has 2 types of window height arranged to maximize privacy at the same time to achive openness to outside.