Sullair air compressors, originating from Michigan City, Indiana, USA, has been focusing on the research and development and manufacturing of-type air compressors for more than fifty years, and is one of the leading air compressor brands in the world. In July 2017, Sulzer joined theachi Group, and the Suzhou factory was officially renamed Hitachi Compressor (Suzhou) Co., Ltd. in 2023. The products of Szer produced by the Hitachi Compressor (Suzhou) factory are sold throughout the country, Southeast Asia, and other regions.

Hitachi is committed to developing social innovation and achieving a sustainable society through data and technology. In the three business areas of "Digital Systems & Services" (helping customers to carry out digital transformation), "Green & Mobility" (achieving a decarbonized society through the energy and rail business), and "Industrial Solutions" (driving product connectivity in a wide range of through digital technology), Hitachi uses the Lumada solution, which integrates IT, OT (Operational Technology), and products, to solve the problems of customers and society. "Digital, Green, Innovation" as the driving force, growth is achieved through co-creation with customers. In the 2023 fiscal year, the sales of the business areas reached 856.43 billion yen (about 40.38 billion yuan), and as of the end of March 2024 the company had a total of 574 companies, and about 270,000 employees worldwide.