Space Quarters, a deep-tech startup originating from Japan’s Tohoku University, announced that it has raised US$5 million in seed round funding. These funds will accelerate the development of space construction robotics and electron beam welding systems for assembling large-scale infrastructure in orbit and on the lunar surface – technologies essential for establishing sustainable human activity beyond Earth.

Founded in 2022, Space Quarters is on a mission to ‘Expand the Potential of Humanity’. The company develops next-generation space construction systems that enable on-site assembly of large orbital and lunar structures using proprietary robotic welding technologies.

Conventional approaches to space infrastructure rely on launching preassembled structures from Earth – a method limited by rocket payload constraints and the risk of structural damage during launch. Space Quarters revolutionises this paradigm by launching modular materials and autonomously assembling them in space using its in-house developed welding robot system. According to the company, this approach dramatically reduces costs while enabling the creation of large, high-value and durable space infrastructure that was previously impossible.

Since its founding, Space Quarters has engaged in joint projects with major organisations including Sky Perfect JSAT, JAXA, Obayashi Corporation and IHI Aerospace, steadily advancing towards commercial implementation.

Space Quarters said the newly raised capital will be used to strengthen and expand the development team; install and upgrade testing and verification facilities; and prepare for on-orbit and lunar demonstration missions planned for 2027–2028.

Having already completed ground-based proof-of-concept tests for its core technologies, the company will now accelerate system-level development and validation in preparation for its official service launch.