◾️Introduction

Our vision for the future of “marine civilization” is one in which cities floating on the vast ocean, or

“floating cities,” produce their own water, energy, and food and live without burdening the earth. In fact,

the key to realizing this vision lies in space development.

Spacecraft and the International Space Station (ISS) use a “closed-loop system” that recycles limited resources repeatedly, as they cannot be resupplied like Earth. By applying this technology, offshore cities can also be made livable without external resupply. In terms of “resource recycling,” the offshore city's recycling system can be applied directly to self-sustaining recycling systems on ships.

◾️Spaceship

・Water is reused thoroughly, with every drop collected and purified, including drainage and moisture.

・Air is purified by removing carbon dioxide and producing oxygen.

・Food is grown in a closed space.

・Energy is supplied mainly by solar power.

In this way, everything is recycled, minimizing the amount of things brought in from outside.

Future maritime cities will operate on the same principle.

◾️Image of life in a maritime city

・The water that comes out of the faucet is desalinated seawater that has been recycled after use. It is safe to drink.

・The air is always clean. Plant factories and algae pools absorb CO₂ and produce oxygen.

・Vegetables and fruits are grown within the city. Freshly harvested produce is served at the dinner table.

・Electricity comes from the sea and the sky. Wave power, tidal power, and solar power drive the city.

・Waste is nearly zero. Food waste is processed biologically and reused as fertilizer or energy.

Marine cities are candidates for new residential areas in response to climate change and population growth. However, a system that continues to transport large amounts of resources from outside sources is not sustainable. That is why the concept of a completely circular system, cultivated through space development, is indispensable.

This is not just a dream for the future, but a practical technology that is directly linked to emergency bases in the event of a disaster and the self-reliance of remote islands and coastal areas.

◾️Conclusion

The technology developed for space exploration will eventually support our lives on land and　at sea. That future is already upon us.

We will disseminate this technology and vision to society and aim to realize a “civilization that lives with the ocean."