World’s First Commercial Launch of Hydrogen 30% Co-Firing Large Gas Engine System ～ Towards a Carbon-Neutral Society with Hydrogen Ready Products ～

Tokyo, September 30, 2025 - Kawasaki Heavy Industries, Ltd. announced today that it would start sales of large class gas engines capable of hydrogen 30％ co-firing for the first time in the world, starting from the same day.

Since October 2024, at our Kobe Works, we have been conducting operational verification of a gas engine power generation system (8MW class), that can co-fire natural gas mixed with up to 30% hydrogen (by volume) as fuel, focusing on hydrogen supply, maintainability, and other operational factors. The verification was completed in September 2025.

The 'Kawasaki Green Gas Engine' has received over 240 orders since its first order in 2011 as a high-efficiency gas engine using natural gas in 5-8MW class. Based on such technology and experience, this product is a hydrogen-ready model that can burn a mixture of up to 30% (by volume) hydrogen with natural gas or city gas, making it adaptable to decarbonization and energy transition.

As a transition technology towards realizing a carbon-neutral society, this product enables practical and sustainable decarbonization as a distributed power source by increasing the hydrogen utilization ratio while leveraging existing facilities and infrastructure.

Product Features

-	High Efficiency & Low NOx Design: Achieves both high efficiency and environmentally friendly performance
-	Flexible Operation: The hydrogen co-firing ratio can be adjusted even during operation
-	Safety Measures: Equipped with hydrogen leak detectors, nitrogen purge systems, and other safety features
-	Retrofit Compatibility: Existing engines can be retrofitted to hydrogen co-firing engines. Note: Specifications differ from the existing KG Series.

Looking ahead to the widespread adoption of hydrogen energy, we are promoting the establish of a hydrogen supply chain (“Production, Transportation, Storage, and Utilization”). Kawasaki will continue to actively develop technologies related to hydrogen to contribute to the realization of global carbon-neutral societies.

Related Links

Kawasaki Successfully Completes Japan’s First Operational Test Run with Thirty-percent-hydrogen Mixed-fuel Large Gas Engine (July 29, 2024)
https://global.kawasaki.com/en/corp/newsroom/news/detail/?f=20240729_3838

Kawasaki Builds Japan’s First Thirty-percent-hydrogen Mixed-fuel Large Gas Engine Verification Testing Facility（April 15, 2024）
https://global.kawasaki.com/en/corp/newsroom/news/detail/?f=20240415_6067

Kawasaki Develops Thirty-percent-hydrogen Mixed-fuel Combustion Technology for Large Gas Engines (March 16, 2022)
https://global.kawasaki.com/en/corp/newsroom/news/detail/?f=20220316_5173

Product information
Gas Engines | Kawasaki Heavy Industries

Toward the Realization of a Hydrogen Society
Toward the Realization of a Hydrogen Society | Kawasaki Heavy Industries