Hitachi Mitsubishi Hydro Corp (HM Hydro) is an industrial equipment company that offers marketing, engineering, installation, construction, and maintenance of hydropower generation systems. The company develops turbine and pump turbines such as Francis type and generators and generator-motors. 

It also provides control and protection systems for hydroelectric power plants, including unit sequencers, protection relays, governors, and excitation controllers among others. In addition, the company offers research and development services. The company operates in Hitachi, Omika, Kobe, and Takasago.