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Japan’s First Green Ammonia Plant Based on KBR’s K-GreeN® Process Now Fully Operational

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The start of green ammonia production at JGC Holdings Corporation’s plant utilizing KBR’s K-GreeN® technology marks a significant milestone in the success of Japan’s journey towards a clean energy future. The plant, sponsored by New Energy and Industrial Technology Development Organization (NEDO), a national research and development agency in Japan, was successfully commissioned in early 2026. 

The teamwork and collaboration between JGC and KBR, both key players in the green ammonia segment, has led to the success of the project. JGC provided engineering and construction services, and now owns and operates the facility, and KBR licensed the green ammonia technology and provided proprietary equipment for this project. 

“Delivering one of the world’s first green ammonia plants shows what’s possible when industry leaders unite behind innovation. By combining KBR’s proven ammonia synthesis technology with advanced electrolyzers, nitrogen generation, and smart energy storage, we’re demonstrating that reliable, renewable based ammonia is not just the future, it’s here today,” Hari Ravindran, SVP and Global Head, KBR Technology Solutions.

The journey began in 2022 when the technology contract was awarded, followed by a two-year engineering and construction phase led by JGC, and this year the commissioning was complete and early production began. 

In the JGC plant, hydrogen is produced by alkaline electrolyzers, supplied by Asahi Kasei,  powered by a photovoltaic plant located nearby and also from the grid, while liquified nitrogen is brought in by tanker trucks. Overall, the plant produces a total of 4 MTPD of green ammonia when operated at full capacity, which will be later used for DeNox (denitrification) in power plants. 

The plant showcases the Integrated Control System, developed by JGC and Asahi Kasei, to manage hydrogen production as well as KBR’s K-GreeN’s Advanced Process Control and proprietary equipment. These design features allow JGC to operate the plant in full dynamic mode, with a rapid and smooth response to any variation coming from the photovoltaic power source. 

KBR is a world leading ammonia technology licensor and we are at the forefront of innovation in the ammonia market. Since 1943, KBR has licensed, engineered, or constructed more than 260 grassroot ammonia plants worldwide.