Marine City / Sea City Unabara
Core idea
Floating ocean cities that grow and renew like living organisms.
Why it matters
A core image of Metabolism's biological-growth megastructure on the sea.
Description
Marine City is a series of unbuilt floating-city proposals developed by Kiyonori Kikutake from the late 1950s and published in the 1960 manifesto Metabolism 1960. The schemes take two principal forms: concentric, city-scale floating structures and linear, national-scale ocean cities. Towers and cylindrical dwelling units are attached to large floating platforms or move-cores, with worn-out units removable and replaceable so that the settlement renews itself over time. The related Sea City Unabara of 1960 proposed a vast circular floating industrial city as a self-contained 'unit-space of production'. By siting habitation on the water, the projects sought settlements free of land scarcity, earthquakes and flooding.
Significance
Kikutake's Marine City projects were among the first and most influential proposals to build megastructures into the sea after the dissolution of CIAM, and they gave Metabolism its central metaphor of architecture as a metabolising organism that grows and sheds parts. They introduced the idea of detachable, replaceable dwelling units on a permanent support, a principle later applied in Metabolist buildings. The floating-city imagery continues to inform marine and artificial-island urbanism.
What became of it
Entirely unbuilt; a Metabolist visionary/theoretical proposal exhibited and published, never constructed.
Critique
Critics note the Marine City schemes prioritised a biologically inspired, technocratic megastructure logic over feasibility, treating the city as an industrial unit-space of production detached from realistic social and economic conditions.
What shaped it
- Cybernetics & systems theory (1948 onward)
- Spaceflight and satellites (1957)
- World War II (1939–45)
- The skyscraper (1885)
- Ville Contemporaine / Plan Voisin / Ville Radieuse (1922–1933)
Plans it influenced
- Yokohama Minato Mirai 21 (1983–)
- Kobe Port Island & Rokko Island Plans (1970s–)
- Plug-in City (1964)
- Walking City (1964)
- A Plan for Tokyo, 1960 (1960)
- New Babylon (1959–1974)
- La Ville Spatiale (Spatial City) (1958–1962)
Sources
- https://en.wikipedia.org/wiki/Kiyonori_Kikutake
- https://archeyes.com/marine-city-megastructure-kiyonori-kikutake/