JT-60SA is officially the most powerful Tokamak.

View of JT-60SA device, resulting from the collaboration between Europe and Japan as part of the Broader Approach Agreement. The facility is located at the seat of the National Institutes for Quantum Science and Technology (QST), Naka, Japan. © F4E/QST.

In a surprise move, one day after the official opening of COP-28 where countries will meet to discuss how to phase out or phase down fossil fuels, Europe and Japan chose their moment right to unveil JT-60SA. The most powerful experimental device to date, built by the two parties, is a landmark achievement for their policy and scientific communities, research organisations and industry.  It’s a clear demonstration of their commitment to invest in fusion, which is efficient, safe, and environmentally friendly.

At a ceremony held on Friday, 1December, the European Commissioner for Energy, Kadri Simson, together with Japan’s Minister for Education, Culture, Sports, Science and Technology, Masahito Moriyama, and Japan’s Minister of State for Science and Technology Policy, Sanae Takaichi, were joined by senior politicians, representatives from industry, and the research community, to inaugurate the JT-60SA facility and witness from the control room a plasma operation.

JT-60SA results from the Broader Approach Agreement, a scientific collaboration signed between the European Union and Japan, to promote the advancement of know-how in fusion through various projects. Works for the device started in 2007 and were completed in 2020 with the end of assembly. Since then, a series of technical improvements were carried out, with first plasma operations towards the end of 2023. The overall cost of the project for the phase of construction, is estimated to be in the range of 560 million EUR in today’s values, shared between Europe and Japan. The project is considered a fine example of science diplomacy and has been praised for the spirit of collaboration, its efficient management, and exemplary execution. Click on the video to learn more.

Fusion roadmap
Fusion roadmap explained through different devices.

In his speech, the Director of Fusion for Energy , Marc Lachaise, praised the international collaboration and the strong team spirit of the teams involved. “What happens here today will matter tomorrow for the contribution of fusion in a carbon free energy mix. JT-60SA is key to the international fusion roadmap because it provides a one-of-a- kind possibility to learn, operate this unique fusion device and to share that valuable knowledge with ITER. Also, it allows European research laboratories and industry, jointly with Japan, to work hand in hand developing a meaningful partnership.”

JT-60SA International School
New generation of fusion scientists brought together via the JT-60SA International School, in the Torus Hall, Naka, Japan. ©F4E/QST

Fusion for Energy (F4E), was entrusted with Europe’s contribution to the project, consisting of the management of EU funds and the co-ordination of the fabrication of components by Belgium, France, Germany, Italy, Spain, who voluntarily participated in the project. EUROfusion, the consortium of 31 European laboratories, has also been contributing, and will continue to do so, by means of hardware and personnel. Japan’s National Institutes for Quantum Science and Technology (QST), Naka, where the device is located, has been responsible for their respective contribution in terms of equipment and staff. The partnership between laboratories and industry is seen as a win-win because it has provided them with an opportunity to collaborate and successfully produce the components of the device.

The merits of fusion energy are several, converting it into a promising candidate for the energy mix of the future. The fuel it requires is abundant, avoiding the risk of geopolitical conflict, and without producing any greenhouse gases. JT-60SA will offer the scientific community the opportunity to receive more training, build further expertise, and perform plasma operations which will improve our understanding of physics. A summer school has also been established to attract future talent and receive training from some of the best experts in the field. Any new knowledge will feed directly into ITER—the biggest international fusion experiment under construction in Europe.

Background information

Download the F4E media pack  here

Press release: Europe and Japan celebrate breakthrough in paving the way for fusion energy (EN) (FR) (ES) (DE) (IT)

MEMO: What is JT-60SA (EN) (FR) (ES) (DE) (IT)

Brochure: JT-60SA

Video: What is JT-60SA?