Japan unveils its first 3D-printed earth home – A new chapter for sustainable construction in Kumamoto
In a notable shift towards sustainable construction, Japanese housing company Lib Work has completed the country’s first 3D-printed house made primarily from locally sourced earth. Located in Yamaga, Kumamoto Prefecture, the project marks a major step toward the company’s long-term ambition. This ambition is a fully automated construction system powered by artificial intelligence.
A prototype home built from soil stronger, smarter, and more sustainable
The house, named Lib Earth House Model B, is the second in a series of 3D-printed prototypes by Lib Work. It follows the earlier Model A, completed earlier this year. However, it features significant upgrades in both structural strength and environmental performance.
Unlike earlier versions that included cement, this structure is made entirely from natural materials, with soil as the main component. According to the company, the new model is five times stronger than its predecessor. It also drastically reduces carbon emissions through its cement-free construction process.
A smart, off-grid home designed for modern living
Beyond its experimental structure, the home integrates a range of smart technologies. Wall-embedded sensors monitor temperature and humidity, detecting potential issues like condensation or material deterioration over time.
Residents can remotely control lighting, air conditioning, and even the bathroom systems via mobile apps. Meanwhile, facial recognition entry replaces the need for traditional keys.
The house also operates completely off-grid, powered by rooftop solar panels and Tesla’s Powerwall battery system. Its open-plan layout, central courtyard, and natural ventilation strategy reflect a deep integration of sustainable living principles.
A step toward AI-driven housing
Lib Work views this project as part of a larger mission. This mission is to create a fully AI-driven home construction system. To that end, the company has partnered with Maket Technologies to integrate generative AI into the design phase. They refer to this concept as “AI Full Auto Build.”
Pre-orders for the Model B home are set to open in August 2025, with full-scale sales launching in January 2026. Lib Work plans to build 10,000 of these homes across Japan by 2040. Additionally, they are exploring potential applications in hospitality, commercial development, and international markets, particularly across Asia.
✦ ArchUp Editorial Insight
This project introduces a new material strategy in construction by using earth as the main element in a 3D-printed home. The images show a warm-toned, curved structure with open voids allowing for natural light and ventilation, paired with an off-grid energy system. However, despite the technological advancements in printing and AI, the design prompts reflection on its adaptability within traditional urban housing contexts. Does it prioritize symbolic expression over practical livability? Still, the prototype marks a bold step forward in sustainable architecture. It merges digital innovation with local material intelligence.
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