In August 2026 the company announced the first close of its Series D round, raising 25.72 billion yen in total. The close combined 16.72 billion yen of new equity with access to 9.0 billion yen in credit and loan facilities.
The company directs the new capital toward its UNITY program, which scales integrated fusion plant testing. The financing package gives the firm both development funding and liquidity headroom for large-scale engineering work.
Source: kyotofusioneering.com
Kyoto Fusioneering supplies core systems for fusion power plants across three families: plasma heating, fuel cycle, and blanket and thermal cycle engineering. Its UNITY-1, UNITY-2, and UNITY-3 facilities provide integrated testbeds where these systems operate together under power-plant conditions.
The company also develops gyrotron-based heating sources and the SCYLLA concept for tritium fuel processing. Together these offerings position the firm as a vertically integrated technology supplier to public fusion programs and private fusion developers.
Source: kyotofusioneering.com
Demand for fusion engineering comes from national laboratories and private developers moving from experiments toward pilot plants. The company supplies this base through a QST test blanket contract supporting ITER, gyrotron systems for the United Kingdom Atomic Energy Authority MAST-U device, and a geothermal power order from Quaise Energy.
Partnerships extend the addressable market beyond pure fusion. A collaboration with NGK covers FLiBe molten-salt handling for advanced nuclear applications, and Oak Ridge National Laboratory hosts the UNITY-3 testbed program. These engagements anchor the company across fusion, geothermal, and nuclear-adjacent applications.
Source: kyotofusioneering.com
