The steel sector accounts for about 7% of global carbon emissions, emphasizing the importance of transitioning to low-carbon steel production. Companies in Japan, South Korea, and China, including Nippon Steel, are at the forefront of developing green steel technologies. Nippon Steel has achieved a significant milestone by reducing emissions by 43% through the use of green hydrogen in steelmaking, setting a world record. Japan is set to introduce subsidies for vehicles utilizing low-carbon steel and is considering legal amendments to promote green steel adoption in various sectors. However, challenges such as scalability issues and the need to import hydrogen may hinder full commercialization. Meanwhile, China's Baowu Steel Group and South Korea's POSCO are also making strides in low-carbon steel technology, with China aiming to lead in DRI technology by 2030. The competition between these countries for dominance in low-carbon steel technology highlights the global shift towards sustainable manufacturing practices.