Daihatsu Diesel Mfg. Co., Ltd. engages in the manufacture and sale of marine and land-use internal combustion engines and industrial equipment. It operates through the following segments: Marine-use Engine, Land-use Engine, and Others. The Marine-use Engine segment provides propulsion diesel and auxiliary diesel engines. The Land-use Engine segment offers land diesel engine, gas turbine/gas engine, and co-generation system. The Others segment includes industrial machinery related business, real estate leasing business, and the electricity sales related business. The company was founded on March 1, 1907 and is headquartered in Osaka, Japan.