Dentsu Group Inc. operates in the advertising business in Japan. The company offers advertising services, including newspapers, magazines, radio, television, internet, sales promotions, movies, out-of-home, public transportation, and other services. It is also involved in the consulting, development, and operation of information systems; sale of various software products; and provision of marketing and comprehensive network services. In addition, the company leases office buildings; and buys and sells real estate properties, as well as offers building and calculation services. Dentsu Group Inc. was founded in 1901 and is headquartered in Tokyo, Japan.