G Three Holdings Corp. engages in the management of its subsidiaries and environment-related business. It operates through the following segments: Renewable Energy Business, New Energy Business, and Sustainable Business. The Renewable Energy Business segment handles the purchase and sale of non-operating solar power plants, solar power plants, and power generation products. The New Energy Business segment deals with the development and sale of emergency generators equipped with liquefied petroleum (LP) gas and city gas engines and emergency magnesium batteries. The Sustainable Business segment covers original equipment manufacturer (OEM) supply of disinfecting equipment. It also includes the sale of basic cosmetics and health food. The company was founded in May 2000 and is headquartered in Tokyo, Japan.