A wholly-owned subsidiary established as a strategic foothold of Mitsubishi Corporation for power development and generation business in North America, where a trend was set early on toward more independent power producers.

Diamond Generating Asia is a wholly-owned subsidiary that was established as a strategic foothold of MC for power development and generation business in Southeast Asia and Taiwan. The company is promoting power generation and sales business in that region, where demand for electricity grows steadily.

Amper Central Solar is a photovoltaic solar electric power company and operated as a joint venture between MC and Spanish company ACCIONA S.A., one of the world's largest renewable energy companies. Since January 2009, Amper Central Solar has been operating a plant in Moura, Portugal. At 46 megawatts, it is the world's largest photovoltaic solar plant.

Forest Energy Kadogawa is a bio-pellet manufacturing company that was established in Kadogawa-cho in northern Miyazaki Prefecture by MC and local company Kiyomoto Co., Ltd. The company processes unused bio-resources from the same forest-rich region and turns it into bio-pellets, which are a renewable clean fuel, thereby contributing to the community and playing a role in the prevention of global warming.

VIS NOVA Trading is a bio-pellet manufacturing and sales company, whose head office is located in Bremen, Germany. The company aims to expand the bio-pellet business, particularly in the EU, which takes active measures against global warming.

LEJ is operated as a joint venture between GS Yuasa Corporation, Mitsubishi Motors Corporation and MC. It was the first company in the world to achieve mass production of large-capacity lithium-ion batteries. The company supplies these batteries to Mitsubishi Motors Corporation and other auto manufacturers in Japan and around the world. It also plans to supply these batteries for general industrial uses such as electrical power storage.

Swing is a general water business company started in Japan and operated as a joint venture between MC, Ebara Corporation and JGC Corporation. It has extensive experience in operation and maintenance of more than 450 facilities across Japan including sewerage plants and water supply plants. It provides solutions for all water needs from water treatment plant construction to maintenance-related management and facility operations.

TRILITY is an Australian water business company and operated as a joint venture between MC, Innovation Network Corporation of Japan, JGC Corporation, and Manila Water Company, Inc. The company operates in four states in the southern and eastern parts of Australia and conducts operation and maintenance management in 14 projects including water supply, sewerage and water reuse, seawater desalination, and industrial wastewater processing and recycling.

Japan Water is operated as a joint venture between MC and Nihon HELS Industry Corporation. The company is a waterworks business contractor that is entrusted by local public entities with the operation of water and sewerage facilities. The company aims to partake in public-private initiatives in waterworks projects in Japan, introducing private-sector knowhow to various stages of maintenance and management in projects including the design, construction and operation of water and sewerage systems that local public entities are responsible for.

Japan Facility Solutions is an Energy Service Company (ESCO) and operated as a joint venture between MC, Tokyo Electric Power Company, Kandenko Co., Ltd. and Yamatake Corporation. In addition to the primary ESCO business, the company is a general contractor, and it operates energy consulting businesses (such as energy conservation analysis and building analysis) and a business that sells systems for converting from other energy sources to electricity.

As a company aiming to contribute to a resource recycling society, San-R has been recovering zinc from steelmaking dust in cooperation with Toho Zinc Co., Ltd. since 1973. The company has also invested in Bioenergy Corp., which operates an electric power plant fueled by methane fermentation in accordance with recommendations in Japan's Food Recycling Law. San-R is also playing a role in a biomass resources recycling project that was started at the same plant in April 2006.