Mitsui E&S Co., Ltd., established in 1937 and headquartered in Japan, operates within the manufacturing sector, specifically focusing on industrial machinery and equipment. The company employs between 5,001 and 10,000 individuals and has reported significant revenue. Its published documents primarily consist of technical reports, with a notable emphasis on advancements in marine engine technology and emission reduction strategies. One of the key themes in their recent publications is the development of supply and safety systems for hydrogen in two-stroke marine diesel engines, highlighting the company's engagement with alternative fuels and the challenges associated with their implementation in the marine sector. The technical reports presented at the CIMAC World Congress address various aspects of engine research and development, including fuel cells, dual fuel engines, and the use of carbon-free fuels such as ammonia and hydrogen. Through these contributions, Mitsui E&S demonstrates its commitment to addressing industry challenges, particularly in relation to greenhouse gas emissions and the integration of new technologies in marine applications.