Our journey began with a conviction: Fusion needs engineers, not only physicists.
Fusion will not be commercialized by scientific discovery alone. It requires engineering — the work of designing, building, and supplying the hardware a power plant actually runs on.
2019
After decades of research, one question remained.
Co-founder Satoshi Konishi spent decades at Kyoto University leading fusion engineering research, and served at ITER as international representative for blanket research.
Yet one question continued to drive him: If fusion energy had reached the point of being technically feasible, why had it still not been put into practical use? The answer, he realized, lay beyond the laboratory. What was missing was not another scientific breakthrough, but an enterprise capable of building the equipment needed to make fusion a reality—and delivering it to the world.
In 2019, Konishi and his co-founders established Kyoto Fusioneering as a spinout from Kyoto University. It was a decision to take on fusion energy as a business. This was the first founding. Today, as global demand for electricity continues to grow and the urgency of decarbonization intensifies, fusion energy is moving beyond the realm of “science for 30 years from now” and toward a stage where practical application is becoming a tangible goal.
The question Konishi asked that day has now become a question the world must confront. To move fusion energy from research into industry. And from a technology of the future into an energy source that can power society.
From research to industry.
Kyoto Fusioneering set out to become the bridge between research and industry, turning scientific achievements into real-world applications. Realizing a fusion energy plant requires far more than the fusion reactor itself. It demands a wide range of engineering technologies, including blankets, fuel cycles, heating systems, and heat recovery. Rather than researching these technologies in isolation, we set out as an engineering company that designs, manufactures, and delivers them to the world. Our mission is to move fusion energy from research to industry—to build the bridge that makes its realization possible.
From an idea to a business in motion.
In the years following its founding, Kyoto Fusioneering evolved from a research and development startup into a company with products and customers.
Its technologies began to be adopted at fusion development sites overseas, its own demonstration facilities became operational, and talent from around the world began to join the company.
As its vision took shape as a real business, Kyoto Fusioneering entered a new stage of growth.
Here, we highlight that journey from three perspectives.
The beginning of a new chapter.
Kyoto Fusioneering is now evolving from a research and development company into a business that supports the emerging fusion industry. As leadership passes from the founding generation to the next, the company is also entering a new phase in terms of its capital base. Following Series D funding round in 2026, Kyoto Fusioneering has raised more than ¥32.9 billion in total. From a company that builds and sells equipment to a company that helps build the industry itself. The Third Founding marks the next chapter in Kyoto Fusioneering’s challenge to move fusion energy from research into industry. And the story is only just beginning.
Employees across the world
160+
Total cumulative equity financing
¥32.9B
Corporate and financial investors
35+