, often abbreviated simply as ADK or sometimes called , is a Japanese advertising agency. Headquartered at Toranomon Hills, Minato, Tokyo since June 2014 (formerly at Tsukiji, Chuo, Tokyo), the firm is Japan's third largest advertising agency, after Dentsu and Hakuhodo. The agency has 38 offices in over 15 countries. One of the offices, Asatsu-DK Europe, was established in 1993 in Amsterdam, Netherlands. The WPP Group holds a 20% share in Asatsu-DK.