gremz, Inc. is a holding company which engages in the creation of the management strategy and handles the administration and supervision of its business subsidiaries. It operates through the following segments: Smart House Project, Energy Cost Solutions, and Retail Electricity. The Smart House Project segment deals with the sale of solar power generation system for general household, storage battery and development of renewable energy. The Energy Cost Solutions segment provides corporate consulting services to reduce electric power consumption and handles the sale of LED lighting. The Retail Electricity segment mainly retail electricity to existing corporate customers. The company was founded on July 4, 2005 and is headquartered in Tokyo, Japan.