The International Thermonuclear Experimental Reactor Organization, responsible for building an experimental nuclear fusion reactor in southern France, is participating in the World Exposition in Osaka to showcase fusion energy technology independently for the first time. The project, initiated in 2007, aims to demonstrate the feasibility of fusion energy by collaborating with countries like China, India, Japan, South Korea, Russia, the United States, and the European Union. Fusion energy, generated by the fusion of light atomic nuclei like hydrogen, offers a clean and sustainable energy source often compared to 'the Sun on Earth'. At the expo, Japan is emphasizing its crucial role in the ITER project and its commitment to a conflict-free society by promoting advancements in clean energy. The exhibition highlights the scientific and technological aspects of fusion energy, attracting visitors interested in clean energy solutions. Additionally, a successful plasma fusion experiment conducted by a Japanese institute in 2023 further supports the development of nuclear fusion technology, showcasing significant progress in achieving sustainable energy goals. The positive sentiment towards fusion energy at the expo reflects a global effort towards clean energy transition and scientific innovation for a greener future.