and transportation. He then took all the service functions including elevators, toilets and pipes and grouped them into 16 reinforced concrete cylindrical towers, each with an equal 5 metre diameter. These he placed on a grid into which he inserted the functional group facilities and offices. These inserted elements were conceived of as containers that were independent of the structure and could be arranged flexibly as required. This conceived flexibility distinguished Tange's design from other architects' designs with open floor offices and service cores – such as Kahn's Richards Medical Research Laboratories. Tange deliberately finished the cylindrical towers at different heights to imply that there was room for vertical expansion. Although the building was expanded in 1974 as Tange had originally envisioned, it did not act as a catalyst for the expansion of the building into a megastructure across the rest of the city. The building was criticised for forsaking the human use of the building in preference to the structure and adaptability. Shizuoka Press and Broadcasting Tower In 1966 Tange designed the Shizuoka Press and Broadcasting Tower in the Ginza district of Tokyo. This time using only a single core Tange arranged the offices as cantilevered steel and glass boxes. The cantilever is emphasised by punctuating the three-storey blocks with a single-storey glazed balcony. The concrete forms of the building were cast using aluminium formwork and the aluminium has been left on as a cladding. Although conceived as a "core-type" system that was included in Tange's other city proposals, the tower stands alone and is robbed of other connections. Nakagin Capsule Tower The icon of Metabolism, Kurokawa's Nakagin Capsule Tower was erected in the Ginza district of Tokyo in 1972 and completed in just 30 days. Prefabricated in Shiga Prefecture in a factory that normally built shipping containers, it is constructed of 140 capsules plugged into two cores that are 11 and 13 stories in height. The capsules contained the latest gadgets of the day and were built to house small offices and pieds-à-terre for Tokyo salarymen. The capsules were constructed of light steel welded trusses covered with steel sheeting mounted onto the reinforced concrete cores. The capsules were 2.5 metres wide and four metres long with a 1.3 metre diameter window at one end. The units originally contained a bed, storage cabinets, a bathroom, a colour television set, clock, refrigerator and air conditioner, although optional extras such as