President Moon Jae-in vowed continued support for the ITER project.
He made the remarks via video message on Tuesday at an event in France marking the official start of assembling the 'International Thermonuclear Experimental Reactor'.
As climate and environmental protection has become important amid the COVID-19 outbreak, ITER member nations are giving hope to humanity. An artificial sun is an energy source of dreams. It is clean energy that utilizes seawater and can be produced in almost infinite amounts while posing no radiological danger and emitting no greenhouse gases.
South Korea, is a member of the ITER project, along with the EU, the U.S., Russia, China, Japan and India.
Seoul will supply what is known as the 'vacuum vessel'.
Moon said the nation will also provide support so that talented local scientists and engineers will be able to participate in the project.
He vowed close cooperation with the international community to realize the common dream of creating "clean and safe fusion energy" by 2050.
ITER aims to conduct the first plasma test in December 2025.