West Holdings Corp. engages in the solar power generation business. It operates through the following segments: Renewable Energy, Energy Saving, Electric Power, Maintenance, and Others. The Renewable Energy segment deals with public and industrial solar power generation systems. The Energy Saving segment provides energy-saving services. The Electric Power segment handles power generation and sales business using solar power generation systems. The Maintenance segment covers the management and maintenance of solar power generation systems and related equipment. The Others segment includes rental income. The company was founded in October 1981 and is headquartered in Tokyo, Japan.