Headquartered in the Toranomon Hills building complex in Minato, Tokyo since June 2014 (previously in Tsukiji, Chūō, Tokyo), the firm is Japan's third largest advertising agency after Dentsu and Hakuhodo.

In August 1998, it entered a business tie-up with the WPP Group.

[6][7] It owns a variety of interests, including production companies NAS and d-rights; animation studio Eiken; animation studio Gonzo; Nihon Bungeisha Publishing; film and print processor Taiyo Seihan; production studio Sun Artist Studio, Supervision Inc.; television commercial production house Prime Pictures; and creative services company Tokyo Ad Party.

[citation needed] In October 2022 ADK President Shinichi Ueno was arrested as part of a Prosecutors investigation into bribery.

Prosecutors alleged that ADK sent ¥47 million to a former executive of the Tokyo Olympics organizing committee through two different routes in exchange for preferential treatment of sponsorship contracts for the 2020 Tokyo Olympic and Paralympic Games.