New Hydrogen Fusion Energy Co., Ltd. has taken a concrete step toward nuclear fusion commercialization: the Japanese company has publicly demonstrated a working prototype of a compact fusion heater, turning a laboratory concept into a physically demonstrable device. This is not a theoretical announcement. It is a prototype that generates heat.
The technology is called NHFE — short for New Hydrogen Fusion Energy — and is the result of more than thirty years of research into so-called cold fusion, dating back to 1989. Its underlying principle differs fundamentally from that of large tokamaks: rather than confining plasma at millions of degrees, the system relies on a composite nano-metal catalyst in contact with light hydrogen (H2) under specific conditions, achieving fusion reactions at just a few hundred degrees Celsius. The device emits less radiation than naturally occurring background levels. According to the company, anyone could operate it safely.
The technical data made available indicate an excess thermal power output of between 400 and 1,000 W per kilogram of sample, with a coefficient of performance — the ratio of output power to input heating power — ranging from 1.5 to 1.7, sustained over several consecutive days. The stated goal for the portable tabletop prototype is to reach 1.0 kW/kg with a COP exceeding 2.0. As evidence of a nuclear reaction, the company has already measured helium-3 produced in proportion to the heat generated; these findings were published in February 2025 in the electronic journal of the Japanese Applied Physics Society.
The project has received public funding from both Aichi Prefecture, under the “2025 New Aichi Creative R&D Subsidy” program, and from Toyota City through the “2025 Toyota City Manufacturing Innovation Subsidy Program.” These grants will support improvements to the system’s heat dissipation performance. Field testing of the heating system is scheduled for winter 2025. New Hydrogen Fusion Energy plans to license its technology and know-how to partner companies interested in commercial production, supporting them through to the industrial stage.
The industrial rationale here is quite different from that of large centralized facilities. While conventional fusion approaches — tokamaks such as ITER or the devices developed by Commonwealth Fusion Systems and Helion Energy — target large-scale electricity generation for grid delivery, the NHFE model is designed for small-to-medium-scale, self-sufficient, distributed heat generation. Manufacturing plants, commercial buildings, and low-to-medium temperature industrial processes: these are the markets NHFE is targeting. The company is actively seeking investment partners and strategic collaborators in the manufacturing and engineering sectors.
The global private fusion landscape is increasingly crowded: more than forty startups worldwide are pursuing different approaches, with total private investment exceeding $7 billion. Most are focused on electricity generation at large scale. NHFE occupies a distinct niche: distributed heat, compact devices, accessible technology. If field tests confirm the laboratory data and the target COP is achieved in a reproducible manner, that niche could become a genuine market. And the prototype just unveiled is the first concrete argument in favor of that possibility.
