IHI Corporation is a Japanese heavy industrial manufacturer with core businesses in aero engines, power and energy systems, and industrial machinery. The company is a primary manufacturer of jet engine components under license from major global engine producers and produces industrial turbines, boilers, and environmental control systems for power generation and industrial facilities.

For international investors, IHI offers exposure to the global aerospace supply chain and Japan's energy infrastructure sector. The company's aero engine business benefits from the long-term recovery of commercial aviation and growing defense procurement, while its energy systems division serves both conventional power generation and emerging applications in hydrogen and ammonia combustion technology — areas receiving significant investment attention as part of Japan's decarbonization strategy.