grems,Inc. engages in the energy solution and electricity retailing businesses in Japan. The company sell commercial and residential solar power generation systems, IoT devices, and various energy-saving equipment to businesses, as well as storage batteries, and electric homes to general consumers. It is also involved in renewable energy development projects; and sell electricity to businesses. The company was formerly known as gremz,Inc. and changed its name to grems,Inc. in June 2025. The company was incorporated in 2005 and is headquartered in Tokyo, Japan.