Mitsubishi Marine Engines

Mitsubishi Heavy Industries, Ltd. (MHI) is a Japanese multinational engineering corporation headquartered in Minato, Tokyo, Japan. Founded in 1934, MHI is a core company of the Mitsubishi Group. Their marine engines are found in 4454 vessels currently in service, spanning 583 models. Bulk carriers represent the largest segment of vessels utilizing Mitsubishi engines with 1069 ships, followed by general cargo ships (714) and oil and chemical tankers (687). Geographically, the highest concentration of these vessels is found in South Asia (707), South East Asia (China, Vietnam) (339), and the Indian Ocean (331). The Mitsubishi - 6UEC52LA is their most common engine model, powering 283 vessels.

Reference: Wikipedia