This 55-unit residential building sits in Bunkyo Otsuka, an area known as home of renowned higher education and medical institutions, catering to families seeking a spacious living accomodation in the heart of Tokyo. While typical reinforced-concrete structures in Japan tend to get disproportionately large beams and columns resulting in heavy-looking facades, we challenged that by inventively detailing the facade elements - thin balcony slabs and alternating vertical dividers are all 120mm in thickness, giving lightness and motion which set up an interplay of light and shadow. The result is a uniquely elegant facade taking advantage of the building's wide structural bays of 9.5m maximum.