Hakuhodo Inc. is a Japanese advertising and public relations company owned by Hakuhodo DY Holdings. It is headquartered at Akasaka Biz Tower in Akasaka, Minato, Tokyo.

Dentsu Inc. is a Japanese international advertising and public relations joint stock company headquartered in Tokyo. Dentsu is the largest advertising agency in Japan and the fifth largest advertising agency network in the world in terms of worldwide revenues.