Heritage Building Energy Retrofit and Revitalization

Development of water retention and rainwater infiltration systems using forestry waste like wood powder and chips. Implemented in Nagano and Okayama, it simultaneously solves urban drainage issues and recharges groundwater. Leveraging wood's porosity as a substitute for traditional concrete products, it also promotes carbon sequestration.

Japanese ZEB (Zero Energy Building) practice integrating renewable energy, insulation technology, and smart building management systems. Expanding rapidly from retrofitting existing structures to new construction, reducing annual energy consumption to zero or negative. Serves as the cornerstone of urban decarbonization and climate resilience enhancement.

Japan's construction industry's initiative to achieve carbon-neutral architecture and ZEB (Zero Energy Buildings). Integrating solar power, battery storage, and high-efficiency insulation to achieve carbon neutrality across the building lifecycle. Positioned as a national project aiming for application to all new construction by 2025.

Nagano's forestry management review and carbon-neutral strategy. Through planned thinning, local wood utilization in construction, and comprehensive forest resource use, it achieves both economic independence for forestry and carbon-negative status. It represents a new forest management model through landowner-business collaboration.

A revival of modern wooden architecture utilizing new technologies like CLT (Cross-Laminated Timber). Architects like Kengo Kuma have rediscovered the potential of wood, advancing timber use in mid-to-high-rise buildings and public facilities. It also draws attention from a carbon-neutral perspective.

Japan's accelerated adoption of renewable energy following the Great East Japan Earthquake. Ranking third globally in solar power capacity, Japan is developing diverse energy sources including offshore wind, geothermal, and biomass. Under the 2050 carbon neutrality declaration, Japanese energy technology continues to contribute to the world's green transition.

The practice of renovating traditional Japanese old houses for modern use. They are repurposed as cafes, accommodations, and offices, gaining attention as a means of regional revitalization. Techniques that blend the beauty of traditional architecture with modern comfort continue to evolve.