Fuji Electric Joins Helical Fusion as Fusion Moves Toward Hardware

Fusion energy is moving into a different phase in Japan: from developing reactor technology to building the industrial systems needed to turn it into a power plant. Helical Fusion has raised ¥3.23 billion ($20.6 million) in the second close of its Series B round, Fuji Electric has joined the company as both an investor and an official partner of its Helix Program.

The industrial connection is significant here ,  Fuji Electric brings expertise in power electronics, power generation, energy infrastructure, industrial systems, instrumentation and control. The companies had already started working together in 2025, when Fuji Electric agreed to supply power-supply equipment for Helical Fusion’s high-temperature superconducting magnet development. 

Their new partnership expands that relationship toward technologies and systems required for future fusion power generation. Helical Fusion is developing a helical stellarator, a fusion architecture designed for steady-state operation. Its roadmap includes Helix HARUKA, an integrated demonstration device now being constructed at the National Institute for Fusion Science campus in Toki, Gifu, followed by Helix KANATA, the company’s planned first fusion power plant in the 2030s.

More than 30 Japanese companies are already contributing to the development and manufacturing of Helix HARUKA. The latest funding also brings in Fujikura, Tokyo Gas, Hazama Ando, Urata, KKT and Kepple Group, expanding the industrial base around the project.

With these the conventional power-generation and industrial engineering expertise is coming into a technology that eventually has to work like a power plant. That is the bigger shift around Helical Fusion: Japan is building the industrial supply chain around fusion before the reactor itself reaches commercial operation.