EX-Fusion
Updated: September 12, 2026
CEO - Kazuki Matsuo
Country: Japan | Funding: ¥4.9B (+)
Founded: 2021
Website: https://ex-fusion.com/
EX-Fusion develops the first commercial laser based nuclear fusion reactor based on a fast ignition method called LIFT. This design was proposed by the Institute of Laser Science, Osaka University. First, a fuel target accelerated to a velocity of 100 m/s is injected toward the center of the reactor. As soon as the target reaches to the center, lasers irradiate the target from all directions to implode the fuel target, and another laser is irradiated to the fuel to induce a fusion reaction. The neutron energy produced by the fusion reaction is absorbed by a device called a “blanket” surrounding the center of the reactor. Then, the energy is converted to electrical energy by heating water in a heat exchanger to turn a turbine. When the cycle from target injection to fuel ignition can be stably repeated at a frequency of 10 times per second, it is believed that the system can be operated as a power plant.
Founded: 2021
Website: https://ex-fusion.com/
EX-Fusion develops the first commercial laser based nuclear fusion reactor based on a fast ignition method called LIFT. This design was proposed by the Institute of Laser Science, Osaka University. First, a fuel target accelerated to a velocity of 100 m/s is injected toward the center of the reactor. As soon as the target reaches to the center, lasers irradiate the target from all directions to implode the fuel target, and another laser is irradiated to the fuel to induce a fusion reaction. The neutron energy produced by the fusion reaction is absorbed by a device called a “blanket” surrounding the center of the reactor. Then, the energy is converted to electrical energy by heating water in a heat exchanger to turn a turbine. When the cycle from target injection to fuel ignition can be stably repeated at a frequency of 10 times per second, it is believed that the system can be operated as a power plant.
