Fueling the
next generation
with fusion
Founder’s Letter
Could it be that fusion energy will never be realized?
Could the mountain we must climb be simply too high?
For years, those who dared the ascent were met with cold skepticism, and the phrase “energy of dreams” was spoken with irony.
Yet those building this future speak with unwavering resolve. They know that ultimate success lies just beyond the greatest difficulties. A team has now assembled, equipped with solutions to these daunting challenges and an unyielding determination to see them through. The strength needed to reach the summit is here.
Now is the moment – necessity and technology have finally risen in harmony.
Breakthroughs in key areas of science and engineering are ushering in a new paradigm for fusion: from high-temperature superconducting magnets to advanced plasma heating and fueling systems. Revolutionary advances in computing, AI, and design tools are accelerating progress even further.
All the essential building blocks are in place, poised for integration.
Thanks to bold investments and support, fusion energy is stepping into the spotlight, and the path toward practical application is being paved. The summit that was once hidden in the clouds is now coming into clear view.
Starlight Engine is moving swiftly and boldly toward fusion power demonstration—and beyond, toward commercialization.
Individuals, companies, municipalities, universities, national laboratories, and governments alike are entrusting their aspirations to Starlight Engine.
At the center of this growing momentum, Starlight Engine will serve as a driving force toward a brighter future.
We will realize fusion energy.
Starlight Engine
We will systematically solve the technological challenges required to transition fusion energy from its current phase of physical experimentation into a practical, deployable energy system.
Our efforts focus on achieving sustained burning plasma, extracting and converting energy, establishing a robust tritium fuel cycle, and demonstrating system integration and safety.
Through technological innovation in tritium combustion and neutron generation, as well as power generation demonstration tests, we aim to advance the development of commercial reactors and contribute to global fusion energy initiatives.
- OUR TECHNOLOGY
Compact, complete —
and closer than ever
FAST will extract fusion energy from burning plasma and demonstrate electricity generation. As the world’s first project to comprehensively solve and validate both plasma sustainment and complex engineering challenges, FAST stands at the forefront of fusion innovation.
Adopting Next-Generation Technologies
Adopting Next-Generation Technologies At FAST, we actively integrate advanced technologies that have yet to be fully realized in fusion development—including high-temperature superconducting (HTS) coils, low-activation materials, fuel breeding blankets, energy conversion and heat utilization systems, and neutron application technologies. By collaborating with leading private and public organizations both in Japan and abroad, we are pioneering bold new approaches to the industrialization of fusion energy.
The Potential of Compact Reactors
The Potential of Compact Reactors The low-aspect-ratio tokamak developed by FAST offers high design flexibility and easier cost management due to its compact footprint. Its adaptable platform makes it the ideal environment for testing and improving critical components like breeding blankets and divertors. This flexible approach allows us to fully validate the integrated systems required to bring small-scale, commercial fusion reactors to life.
Partnering with Communities
Partnering with Communities The site for FAST will be chosen following a nationwide public bidding process. Guided by total transparency and open dialogue with local residents, we are committed to developing fusion energy with the highest safety standards. By establishing a new center for research and building an advanced industrial supply chain, we aim to make the host region a cornerstone of future innovation.
Broader Impact
Broader Impact FAST is a device designed to conduct integrated technological testing regarding burning plasma and energy generation. Beyond advancing tokamak-type fusion development in Japan, it contributes to the safe and accelerated progress of various other fusion modalities being developed worldwide.
- OUR UNIQUE APPROACH
Advancing engineering to the next frontier
We have adopted the tokamak system—the most extensively researched and data-backed plasma confinement method—enabling effective cost and technical risk management.
As we move toward the commercialization of fusion energy, FAST will demonstrate power generation while addressing the following key technological challenges:
Power Generation Demonstration
Extraction of energy produced by fusion reactions and demonstration of power generation.
Development of Enabling Technologies
Development of key technologies including high-temperature superconductivity, tritium loop systems, and maintenance/replacement technologies.
Establishment of an Industrial Foundation
Building a robust industrial base through the development of a fusion-plant supply chain and the cultivation of a skilled fusion workforce.
- KEY RESEARCHERS
Leading minds at the forefront of FAST
“Today, thanks to decades of academic progress and remarkable advances in industrial technology, the idea of demonstrating fusion-based power generation no longer feels like a distant dream. It’s becoming a real, achievable target.”
Professor Akira Ejiri, Director of Transdisciplinary Fusion Energy Center, Graduate School of Frontier Sciences, The University of Tokyo.
“Today, thanks to decades of academic progress and remarkable advances in industrial technology, the idea of demonstrating fusion-based power generation no longer feels like a distant dream. It’s becoming a real, achievable target.”
Professor Akira Ejiri, Director of Transdisciplinary Fusion Energy Center, Graduate School of Frontier Sciences, The University of Tokyo.
Join us in shaping the future of fusion
We are seeking companies and organizations interested in participating in and supporting our project.
