Helical Fusion has completed a JPY 3.23 billion Series B second close, with Fuji Electric joining the fusion energy company as both a strategic investor and Official Partner of its Helix Program.
The financing expands the industrial coalition supporting Helical Fusionโs development roadmap, which targets commercially viable fusion power in the 2030s. Other investors in the second close include HAZAMA ANDO CORPORATION, Fujikura Ltd., TOKYO GAS CO., LTD., KKT LLC, URATA Co., Ltd., Ecrowd NEXT and Kepple Group, Inc.
Including grants and loans, Helical Fusionโs cumulative funding has reached approximately JPY 13.15 billion. The company said the latest capital will accelerate development toward integrated demonstration with Helix HARUKA and subsequent net-electricity generation with Helix KANATA, its first fusion power plant.
Fuji Electric Expands Industrial Collaboration
Fuji Electric brings capabilities in power electronics, power generation, energy infrastructure, industrial systems, instrumentation and control, and nuclear-related technologies. Its participation expands the expertise supporting the development of fusion power systems.
The companies began working together in 2025, when Fuji Electric agreed to supply power supply equipment for Helical Fusionโs high-temperature superconducting magnet development. Under the new capital and business alliance, their collaboration will expand toward products, services and advanced technologies for future fusion power systems.
Fuji Electric has also joined the Helix Program Official Partners, established in April 2026 for companies making strategic business and significant capital commitments to fusion power development.
Helix HARUKA Construction Advances
Construction of Helix HARUKA, Helical Fusionโs Integrated Demonstration Device, is progressing at the National Institute for Fusion Science campus in Toki City, Gifu Prefecture. The device is designed to integrate and demonstrate technologies including high-temperature superconducting magnets and blanket systems.
More than 30 Japanese companies are contributing to its development and manufacturing. The project combines NIFS research capabilities, Japanese government support, industrial manufacturing expertise and Helical Fusionโs system integration.
Helix Program Targets Commercial Fusion
The Helix Program is Helical Fusionโs roadmap toward commercially viable fusion power using the Helical Stellarator. Its development is guided by continuous operation, net electricity and high maintainability.
Helical Fusion aims to demonstrate core high-temperature superconducting magnet and blanket/divertor technologies by the end of the 2020s. Integrated demonstration with Helix HARUKA and net-electricity generation through Helix KANATA are targeted for the 2030s.
The company was founded in 2021 as a spin-out based on research originating from Japanโs National Institute for Fusion Science. Japan has developed the Helical Stellarator approach for approximately 70 years, with NIFSโs Large Helical Device providing extensive research and engineering experience.
Helical Stellarator Research Foundation
NIFSโs Large Helical Device, one of the worldโs largest superconducting stellarator-type experimental devices, has accumulated extensive scientific and engineering knowledge. Its achievements include plasma operation lasting 3,268 seconds, or approximately 54 minutes, and plasma temperatures exceeding 100 million degrees Celsius.
Helical Fusion is building on this research foundation while developing the engineering systems needed to advance the Helical Stellarator from a research platform toward a power generation system.
Takaya Taguchi, Co-Founder and CEO of Helical Fusion commented, โThe Helix Program is steadily moving forward. At the Helix HARUKA construction site, our team and industrial partners are working together every day to turn fusion technology into real hardware.
The participation of Fuji Electric and other leading companies across Japanโs energy and industrial sectors further strengthens the foundation for building a new energy industry. Fusion requires capabilities across power electronics, materials, manufacturing, power generation systems and many other fields, and bringing them together is exactly what the Helix Program is designed to do.
Japan has accumulated nearly 70 years of knowledge in Helical Stellarator research and has one of the worldโs strongest manufacturing and engineering ecosystems. We intend to bring these strengths together to realize commercial fusion power and create a new global energy industry.โ