West Holdings Corp. engages in the solar power generation business. It operates through the following segments: Renewable Energy, Energy Conservation, Electric Power and Maintenance Business. The Renewable Energy Business segment is a self-consumption industrial solar power plant contracting (EPC) business non-fit solar power plant development and sales business. The Energy Conservation Business segment provides total energy conservation services (west energy service business), etc. The Energy Conservation Business segment provides green electricity wholesale business Power generation and sales using own solar power generation system. The Maintenance Business segment is a comprehensive management and maintenance of solar power generation systems and related equipment. The company was founded in October 1981 and is headquartered in Tokyo, Japan.