No.1 Co., Ltd. engages in the sale and maintenance of office automation and communications equipment. It operates through the Office Consulting Business and System Support Business segments. The Office Consulting Business segment offers office automation and communications equipment, web production, systems environment consulting, and general affairs consulting services. The System Support Business segment deals with the maintenance of products as well as the sale of equipment and appliances through office mail order. The company was founded on September 27, 1989 and is headquartered in Tokyo, Japan.