Japan is pioneering a bold, futuristic concept to protect against rising sea levels: Dogen City, a circular floating metropolis designed by the startup N‑Ark under its New Ocean consortium.
Core Design & Scale
- Size: 1.58 km in diameter (~4 km circumference), roughly city-village scale.
- Capacity: ~10,000 residents and an additional 30,000 visitors (tourists, workforce).
Resilience by Design
- Ring structure: hull-shaped outer ring protects against tsunamis and severe weather.
- Flexible anchoring: Autonomous floating units allow adaptation to tides and water-level changes.
Three-Layer Infrastructure
- Habitable Ring – living spaces, housing, public amenities, resembling a village.
- Undersea Edge Data Center – seawater-cooled, supporting city management, healthcare analytics, and drug research.
- Floating Architecture – modular, reconfigurable units for tourism, research, or medical use.
Sustainability & Self‑Sufficiency
- Energy: Solar, wind, wave; plus undersea data center’s passive cooling lowers power use.
- Food & Water: Hydroponics, aquaculture, seawater hot springs, and wastewater recycling .
- Healthcare Hub: Telemedicine, robotic surgery, preventive health; branded a “no-illness” city promoting wellness.
Purpose & Broader Impact
- Disaster refuge: Serves as shelter during tsunamis, floods, or disasters.
- New maritime economy: Envisions oceans as hubs of activity—data, tourism, marine research, even space launch functions.
Timeline & Challenges
- Demo projects: “Green Ocean” aquaculture in Lake Hamana since 2021; full city aimed for circa 2030.
- Hurdles: High costs (possibly ~¥100 trillion, ~$800 billion), securing regulation, public acceptance, and complex marine engineering.
Takeaway
Dogen City is an audacious fusion of coastal resilience, healthcare innovation, and maritime sustainability. While still conceptual, it exemplifies the next frontier in adapting urban life to climate change—offshore, self-sufficient, and ready to ride the waves of tomorrow.
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