G Three Holdings Corporation focuses on renewable energy, engaging in the construction and operation of solar power facilities throughout Japan. The company generates and sells electricity derived from these solar installations. Beyond its solar initiatives, it also develops emergency power generation systems that utilize both LP gas and city gas as fuel sources. Recently, the firm has expanded into the low-carbon refrigerant sector, promoting natural refrigerants for air conditioning and refrigeration equipment, alongside the development of related pressure sensors. Furthermore, it has initiated a new venture concerning grid-scale energy storage systems. Established in 2000 and based in Tokyo, Japan, the company adopted its current name, G Three Holdings Corporation, in January 2016, previously operating as Connect Holdings Corporation.