Mitsui Marine Engines

Mitsui, a Japanese general trading company founded in 1947 with headquarters in Tokyo, is a prominent marine engine manufacturer. Their engines are installed in 3510 vessels globally, spanning 402 distinct models. Bulk carriers represent the largest segment of vessels utilizing Mitsui engines, with 2121 units, followed by oil and chemical tankers (498) and container ships (376). Geographically, their engines are most prevalent in South Asia (468 vessels), South East Asia (China, Vietnam) (424 vessels), and the Indian Ocean (361 vessels). Among their most frequently encountered models are the Mitsui - 6S50MC-C (418 units), Mitsui - 6S50MC (240 units), and Mitsui - 6S60MC (232 units).

Reference: Wikipedia