House in Toyama by NYAWA: A Sustainable Renovation in Hokuriku, Japan

Revitalizing Tradition with Modern Sustainability

House in Toyama is a thoughtfully renovated home located in Toyama, Japan, designed by NYAWA. Originally an abandoned house in the Hokuriku region, this project transforms the space into a vacation home and rental property, blending traditional Japanese architecture with modern sustainability.

A Low-Impact Renovation Honoring Local Heritage

The project prioritizes energy-efficient restoration, preserving the original structure while minimizing environmental impact. The design reflects the region’s architectural heritage, particularly the concept of HIROMA—a multi-purpose gathering space traditionally found in Hokuriku homes. This area serves as a communal indoor space that maintains a connection to nature, even during the region’s cold winters.

Open Spaces with Structural and Thermal Efficiency

Inspired by traditional Japanese architecture, the renovation adapts HIROMA to modern needs. The space is centrally located and remains open and fluid, with minimal walls to allow natural light and ventilation. Structural reinforcements, inspired by the local pear orchards, create a bright and open atmosphere, essential in Toyama’s often cloudy climate.

To enhance thermal comfort, the renovation strategically incorporates insulated compartments around HIROMA while maintaining an open layout. The lowest floor level and highest ceiling within the house create a dynamic, multi-layered environment, fostering intimate spaces throughout.

Blurring the Boundaries Between Past and Future

The renovation follows a sustainable design approach, emphasizing materials that evolve over time:

• Upcycled timber from the original structure.
• Natural materials like plywood, copper, silk, and textiles that age gracefully.
• Traditional Japanese proportions that honor the house’s history.

These choices create a timeless aesthetic, ensuring the home’s story continues for generations.

A Zero-Carbon Approach to Sustainable Living

One of the renovation’s key achievements is its carbon-neutral impact. By balancing CO2 absorption from reclaimed wood with the emissions from construction, the project exemplifies eco-friendly architecture. Additional sustainable features include:

• Passive design strategies that maximize natural daylight and ventilation.
• Sliding doors that offer flexibility between open-air living and climate control.
• Minimal new material usage, reducing the project’s environmental footprint.

Redefining Rural Japanese Living

House in Toyama is more than just a renovation; it’s a model for sustainable architecture in Japan’s rural regions. By integrating local traditions, modern efficiency, and environmental consciousness, NYAWA creates a space where visitors can experience authentic Japanese living while supporting the revival of Toyama’s historic homes.

This project exemplifies the potential of low-energy, culturally sensitive renovations, bridging the past and future while fostering a sustainable community in rural Japan.

All Photographs are works of  Kenta Hasegawa