Close of a JPY 2.7B Series B round brings total funding to JPY 9.8B for Japan’s helical stellarator effort.
Helical Fusion, a Japanese private fusion company developing the Helical Stellarator, announced the launch of Helix Program Official Partners, a new strategic framework designed to bring together long-term industrial collaborators committed to building the fusion energy industry in Japan. The first three partners are NICHIAS Corporation, Hasetora Spinning Co., Ltd., and Seno Kisen Co., Ltd. In support of this effort, Helical Fusion also completed the first close of its Series B round, raising approximately JPY 2.7 billion ($17M US), bringing its total fundraising to JPY 9.8 billion ($61.4M US).
“Commercial fusion will not be realized by a startup alone, or by physics alone. It requires a coalition of companies willing to apply the strengths they have built over generations to one of the most consequential industrial challenges of the next century. Helix Program Official Partners was created for that purpose,” said Takaya Taguchi, Co-Founder and CEO of Helical Fusion Co., Ltd.
Helix Program Official Partners Kicked Off With Three Partners
Helical Fusion’s Helix Program Official Partners effort kicked off with the incorporation of its first three partner companies. Unlike conventional sponsorship programs, Helix Program Official Partners is structured for companies that will work alongside Helical Fusion as active industrial collaborators. Participation is tied not only to strategic business alignment, but also to capital commitment from the new partners. The framework is intended to support manufacturing and construction for Helix HARUKA, Helical Fusion’s integrated demonstration device, and ultimately Helix KANATA, the company’s planned fusion pilot plant in the 2030s. The first three founding companies are:
- NICHIAS Corporation, founded in 1896, has supplied insulation, sealing, and high-performance industrial products to sectors that have underpinned modern industrial society, including shipbuilding, petroleum refining and petrochemicals, electric power, automobiles, construction, and semiconductors. Its participation reflects the view that the technologies required for large-scale industry in one era can become enabling technologies for a new energy system in the next.
- Hasetora Spinning Co., Ltd., founded in 1887, has evolved through more than a century of manufacturing while building expertise in materials and textile-based technologies. Its decision to join points to a broader idea central to fusion commercialization: that advanced materials companies with deep manufacturing DNA may have an important role in shaping the infrastructure of future energy.
- Seno Kisen Co., Ltd., founded in 1946 and built through decades of global maritime operations, brings expertise in industrial logistics, fleet management, and the movement of essential resources that sustain economies. Its participation underscores that future energy systems will not depend only on invention, but on the operational disciplines needed to move, deploy, and sustain large-scale assets in the real world.
Series B Fundraising Closes to Further Advance Hardware Roadmap
In connection with the broader partnering push, Helical Fusion also completed the first close of its Series B round, raising approximately JPY 2.7 billion ($17M US). Investors in the round include NICHIAS Corporation, Hasetora Spinning Co., Ltd., Seno Kisen Co., Ltd., Ecrowd NEXT, Konoike Transport Co., Ltd., and MITANI SANGYO Co., Ltd., among others. Among these investors, NICHIAS Corporation, Hasetora Spinning Co., Ltd., and Seno Kisen Co., Ltd. are also participating as the first founding companies in Helix Program Official Partners, linking capital commitment with long-term industrial collaboration. Including grants and loans, the company’s total funding to date has reached approximately JPY 9.8 billion ($61.4M US).
The company said this additional capital will support continued development under the Helix Program alongside the expansion of its industrial partnership network. In that regard, Helical Fusion is already advancing its hardware roadmap. Manufacturing and construction is underway for magnet demonstration work for Helix HARUKA at a dedicated Helical Fusion workspace on the campus of the National Institute for Fusion Science in Toki, Gifu. The company sees this as an important step in moving from design intent to integrated execution, supported by a growing network of industrial collaborators across Japan.
Cutaway visualization of the Helix HARUKA helical coil concept. Source: Helical Fusion.
Industry Coalition as a Commercial Fusion Strategy
As electricity demand grows globally and countries search for scalable, low-carbon, strategically resilient energy systems, Helical Fusion believes the next phase of fusion competition will be decided not only by scientific milestones, but by the ability to organize industry around deployment. Through the Helix Program Official Partners, the company aims to show that Japan’s industrial base can become a decisive advantage in the global race to commercialize fusion energy.
By launching the Official Partners framework, Helical Fusion is making a broader statement about how fusion commercialization may emerge in Japan: not as an isolated venture effort, but as a coordinated industrial project that draws on the country’s accumulated strengths in manufacturing, engineering, materials, and supply chains.
