While Obayashi Corporation with a talking title
is planning to build a space elevator until 2050 , Shimizu, also from Japan, wants to capitalize on the deep sea: she
promises to build an underwater city. The company presented the project drawings and will be engaged in the search and development of the necessary technologies for it.
About 70% of the Earth’s surface is covered by an ocean that has great potential for human development. Unused depth can be settled by people who will be engaged in business and scientific research, develop technology. Underwater cities will help to cope with the problem of rising sea levels and land shortages.

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Japanese drawing.

The main "building" will be a sphere with a diameter of 500 meters, partially visible from the water. This is the main entrance to the city. Apartments, hotels and offices will be located here. Employees of companies can live right next to work. Inside there will be an atrium called Blue Garden. The company among the main positive features of the project names three:
- Good climate, minimal temperature changes.
- Security: no earthquakes and hurricanes.
- No air pollution.


Blue Garden is a great place to go deep under water. If you do not have claustrophobia and hydrophobia. In addition, Blue Garden should become a business center and a major transportation hub.


Infra-helix will help supply the city with electricity using the difference in water temperature at different depths, to engage in desalination, food production and environmental monitoring.

The lower part of the city will be fixed at the bottom. This module will be a research center.

How will build a sphere?
The diameter of the sphere is 500 meters. It is necessary to take into account the water pressure and select the most suitable materials. For the time being, it is planned to use concrete reinforced with a special material from spent plastic bottles. Triangles with an edge of 50 meters will be glazed with acrylic. Also it is necessary to protect the external surface from plants.


The sphere will be built in parts on the surface of the water. The depth will be adjusted with the help of three smaller spheres filled with ballast.


The project reminded me of another underwater city. But there everything was much sadder.
