I decided to re-enact this scenario using some eyeballs.. looks rather less convincing.
But here is the text that explains everything, via the Institute for East Asian Architecture
The Transient City
As Japan rebuilt her devastated cities after 1945 and launched the high-growth economy, the sense of transience resurfaced on a gigantic scale and in a completely secular mode. The Japanese city of today is largely a haphazard, interchangeable mosaic of postage-stamp land parcels that seem rather messy from the viewpoint of classical aesthetics. Yet it is hygienic, efficient and very adaptable to rapid change, and hence an important underpinning of the world's second-largest economy. The Western concept of the City Beautiful or even an Urbs Eterna, centered on the civic square with splendid and hardly changing public institutions, has as its counterpart in Japan the City Vital, flexible and energetic with constant easy access to entertainment and information. While the masses indeed sleep in "rabbit hutches" they work and play in cities that have no equal anywhere for liveliness, visual complexity and social dynamics.
The new Japanese urbanism found its purest theoretical expression in the daring ideas of the Metabolists, a group of young architects, designers and urban planners working in Tokyo in the 1960s. Applying the principles of metabolism and metamorphosis as discovered in the organic world, they reconceived the city as a huge kit of infrastructures and element-structures passing through interrelated cycles of growth, decay, renewal and change (6). Though internationally celebrated, they realized very little of their dreams because of – as we can see now – the super-scaled and autocratic character of their proposals. Ironically, most of their ideas eventually came about in the succeeding vernacular urban architecture of Japan, without the Metabolists' direct influence and despite the mostly monumental structures they themselves later designed and built.