The Decarbonisation Expo in Chiba near Tokyo is a pioneering trade fair dedicated to showcasing and promoting decarbonisation solutions. This annual event, held in October, is organized by RX Japan and is an integral part of World Smart Energy Week. The expo takes place at the renowned Makuhari Messe, one of Japan's largest and most modern exhibition centers, distinguished by its excellent infrastructure and accessibility. Located near Tokyo, Makuhari Messe serves as a strategic meeting point for industry experts, businesses, and stakeholders from around the world. The expo's thematic range is broad, covering crucial aspects of decarbonization, including self-consumption solutions for PV systems and Corporate Power Purchase Agreements (PPA), promoting the use of rechargeable batteries and electric vehicles, the development and implementation of net-zero energy buildings, and smart building technologies. Additionally, advanced energy management systems, energy efficiency consulting services, renewable energies and their environmental values, the next generation of ventilation technology, and energy-saving devices are presented. A distinctive feature of the Decarbonisation Expo is its focus on promoting technologies and practices that help companies and organizations reduce their CO2 emissions and ensure more sustainable operations. The expo offers a unique opportunity to learn about the latest innovations, explore business opportunities, and forge partnerships with like-minded individuals committed to reducing environmental impacts and promoting a sustainable future. As part of World Smart Energy Week, the Decarbonisation Expo provides a unique opportunity to gain insights into the latest trends and developments in renewable energy and energy management solutions. It brings together manufacturers, service providers, researchers, policymakers, and consumers to collaborate on shaping a sustainable future. The expo plays a crucial role in raising awareness and supporting initiatives to reduce global CO2 emissions and combat climate change. The DECARBONISATION EXPO takes place for the 5th time on 3 days from Wed., 17.09.2025 to Fri., 19.09.2025 in Chiba.