A mixed-use building of restaurant, owner's residence, and apartments located in the central Tokyo. The idea of design is to have an integrated exterior facade while having a variety of internal program requirements. In order to do so, we have carefully controled sizes and patterns of internal terrace space, the opening of terrace and the openning with window sash. Also we control the sectional detail of the sash and applied it to terrace openning to express as 'steps' in RC structure. The result is the the 'steps' are expressed as overhanged floor slab and has a 'classic' looking while achiving a synple modern expression.