Modern civilization has evolved at a rapid pace since the beginning of the 20th century. A key factor behind this was the invention of the engine, a new device that powered vehicles and manufacturing machinery. Engines also form the core of generators that produce electricity. Even now, engines continue to evolve as the driving force in support of a comfortable society and manufacturing activities. In 1917, MHI became the first Japanese company to develop and build a diesel engine, and since then has steadfastly pioneered technologies for the reciprocating engine.*