Kyoto Fusioneering
Updated: August 20, 2026
CEO Taka Nagao
Country: Japan | Funding: ¥22.3B (+)
Founded: 2019
Website: https://kyotofusioneering.com/
Kyoto Fusioneering is developing fusion reactor, called Unity-3, to test a fuel cycle technology known as a breeding blanket (that harvest energy from the reactor while also generating fresh fusion fuel). The breeding blanket design will use liquid lithium, which will absorb both heat and neutrons. As the lithium atoms in the blanket are bombarded with neutrons, they split into helium and tritium, an isotope of hydrogen that’s an important fuel for many reactor designs. The tritium is then separated from the blanket and sent to the reactor, while heat is extracted to generate power. Kyoto Fusioneering is also developing systems to heat fusion fuel into a plasma, recycle unburned fuel from the exhaust, and harvest heat to generate electricity.
Founded: 2019
Website: https://kyotofusioneering.com/
Kyoto Fusioneering is developing fusion reactor, called Unity-3, to test a fuel cycle technology known as a breeding blanket (that harvest energy from the reactor while also generating fresh fusion fuel). The breeding blanket design will use liquid lithium, which will absorb both heat and neutrons. As the lithium atoms in the blanket are bombarded with neutrons, they split into helium and tritium, an isotope of hydrogen that’s an important fuel for many reactor designs. The tritium is then separated from the blanket and sent to the reactor, while heat is extracted to generate power. Kyoto Fusioneering is also developing systems to heat fusion fuel into a plasma, recycle unburned fuel from the exhaust, and harvest heat to generate electricity.
