Kyoto Fusioneering – founded in 2019 and headquartered in Tokyo, Japan, with offices and subsidiaries in the United Kingdom, United States, and Europe – is a fusion-engineering company developing critical technologies and integrated systems for commercial fusion power plants. The company designs and supplies fusion power-plant components, including plasma heating (gyrotron) systems, fuel-cycle solutions, and thermal-cycle and blanket technologies, intended to support the engineering and deployment of fusion energy systems globally.

Kyoto Fusioneering provides engineering solutions, plant-level integration, and testing facilities such as UNITY-1 and contributes to fusion development through partnerships with research institutions and industry participants worldwide.