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Fusion Plasma Science and Engineering Lab
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A plasma lab working toward fusion energy, the "Sun on Earth."
AboutAbout the lab
Let's create a sun on Earth.
The Fujita Lab conducts research and education on plasma, with the aim of putting fusion energy to practical use.
The lab works on experiments using the toroidal plasma experimental device SOLEIL and the linear plasma experimental device NUMBER, as well as numerical calculations of fusion reactors using tools such as the integrated transport code TOTAL.
The lab collaborates with multiple research institutions, including analysis of JT-60 experimental data through joint research with the National Institutes for Quantum Science and Technology.
Key terms
- Nuclear fusion
- A reaction in which light atomic nuclei join to form a heavier nucleus. A large amount of energy is released in the process
- Plasma
- A state of gas at very high temperature in which atoms are separated into electrons and ions
- Demonstration reactor (DEMO)
- A reactor built as the next step after an experimental reactor, to actually demonstrate power generation by nuclear fusion
NewsLab news
Photo of SOLEIL wins the Editorial Committee Special Award at the Japan Society of Plasma Science and Nuclear Fusion Research photo and illustration contest
Student wins a poster presentation award at an Asia-Pacific conference on plasma physics
Figure from a student's paper featured on the cover of the Journal of Plasma and Fusion Research
First plasma successfully generated in the new toroidal plasma experimental device SOLEIL
Paper on a method for calculating the conductance of divertor exhaust paths published in Journal of Nuclear Science and Technology
ResearchResearch themes
The lab conducts research on plasma and fusion in order to realize fusion energy, also known as the "Sun on Earth." Using computational codes and experimental devices, it works on design studies of fusion reactor systems, research on plasma confinement, and research on fundamental plasma physics.
*Illustrative imageDesigning fusion reactors
The lab numerically analyzes the energy balance of fusion reactors and explores fusion reactor designs (conceptual designs) under a variety of conditions. It also works on simulations of a demonstration reactor using the integrated transport code TOTAL.
*Illustrative imageConfining plasma with magnetic fields
The lab pursues the advancement of plasma confinement by a doughnut-shaped magnetic field (toroidal magnetic field) through both experiments and numerical analysis. With the toroidal plasma experimental device SOLEIL, which began operation in February 2025, it is deepening the understanding of the plasma in the boundary layer of fusion reactors.
*Illustrative imageExploring the fundamentals of plasma
The lab aims to contribute to fusion plasma research by understanding plasma from both a microscopic viewpoint, the reactions of atoms and molecules, and a macroscopic viewpoint, magnetohydrodynamics. With the linear plasma experimental device NUMBER, it conducts research using plasma with a strong magnetic field and high density.
MembersFaculty
The members of the Fujita Lab are faculty members and students in the doctoral, master's, and undergraduate programs.As of 2026
- ProfessorTakaaki Fujita
- Associate ProfessorAtsushi Okamoto
- Assistant ProfessorYuichi Kawachi
- Project Assistant ProfessorHiroshi Yabumoto
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped)
- Designing fusion reactors: “LIFE fusion chamber” Lawrence Livermore National Laboratory / Public domain (cropped)
- Confining plasma with magnetic fields: “Openstax college-physics 22.26b tokamak-schematic” OpenStax / CC BY 4.0 (cropped)
- Exploring the fundamentals of plasma: “Glowing plasma of the silver” Abdullahkepceoglu / CC BY-SA 4.0 (cropped)
- Related lab (Nuclear Measurement Engineering Lab): “Experiment using an electronic neutron generator” Idaho National Laboratory / CC BY 2.0 (cropped)
- Related lab (Energy Magnetohydrodynamics Engineering Lab): “Large Helical Device 2014” National Institute for Fusion Science / CC BY-SA 4.0 (cropped)
- Related lab (Fusion Reactor Engineering Lab): “Baseball II magnetic mirror” Uknown LLNL photographer / Public domain (cropped)
- Related lab (Energy Nanomaterials Creation Lab): “View of equipment in Vacuum Laboratory, Sample Operations Area, LRL bldg 37 (S68-25204)” NASA Johnson Space Center / Public domain (cropped)
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