One of architect Kenzo Tange's most iconic buildings, this early example of Metabolist architecture was completed in 1967 and occupies a prominent corner location just north of Shimbashi station. Built on a triangular site that's only 189 square meters in size, the building is constructed around a 7.7m-diameter cylindrical core containing elevators and stairways as well as kitchens and bathrooms on each floor. Individual cantilevered office units are attached to the core, which is 57 meters high, using gigantic bolts.