• 1901

    Hoshiro Mitsunaga establishes Japan Advertising Ltd. and Telegraphic Service Co.

  • 1906

    Telegraphic Service Co. becomes Japan Telegraphic Communication Co., Ltd.

  • 1907

     Japan Advertising Ltd. merges with Japan Telegraphic Communication Co., Ltd. and starts to engage in communication and advertising operations.

  • 1936

    Japan Telegraphic Communication Co., Ltd. relinquishes its news services department to Domei News Agency and re-launches itself as a specialized advertising agency.

  • 1943

    The Company acquires 16 companies in a move to augment its advertising agency business. Operational bases are established in Tokyo, Osaka, Nagoya and Kyushu.

  • 1947

    Hideo Yoshida becomes the fourth President.

  • 1948

    Creation of the Dentsu Advertising Awards.

  • 1949

    Creation of the Dentsu Advertising Essay Contest for Students.

  • 1951

    Dentsu establishes the Radio Division at its Head Office and local offices. Commercial radio broadcasting begins in Japan.

  • 1953

    Dentsu creates the Radio and Television Division at its Head Office and local offices. Commercial television broadcasting begins.

  • 1955

    Dentsu Advertising Ltd. becomes the new company name.

  • 1967

    Completion of Tsukiji Head Office Building.

  • 1974

    Advertising Age ranks Dentsu No. 1 advertising agency worldwide in terms of (calendar 1973) billings.

  • 1981

    The company formerly known as JIMA Dentsu Advertising, Ltd. and U.S. partner Young & Rubicam's Japanese affiliate establish Dentsu Young & Rubicam as a joint venture in Tokyo.

  • 1984

    Dentsu and U.S.-based Young & Rubicam jointly establish DYR, an international service network.

  • 1985

    Gohei Kogure becomes the eighth President.

  • 1988

    Advertising Age names Dentsu the 1987 "International Agency of the Year."

  • 1989

    Fiscal 1989 billings exceed 1 trillion yen.

  • 1993

    Gohei Kogure becomes the first Chairman. Yutaka Narita becomes the ninth President.

  • 1995

    Dentsu establishes five domestic regional subsidiaries.

  • 1996

    Japan-China Advertising Education Exchange Project commences.

    Dentsu Tec Inc. is established.

  • 2000

    Dentsu makes an equity investment in the Bcom3 Group.

    Information Services International-Dentsu, Ltd. lists its shares on the First Section of Tokyo Stock Exchange.

  • 2001

    Dentsu lists its shares on the First Section of Tokyo Stock Exchange.

    Dentsu commemorates its 100th anniversary.

  • 2002

    Yutaka Narita becomes the second Chairman. Tateo Mataki becomes the 10th President.

    The Bcom3 Group merges with Publicis Groupe S.A. Dentsu acquires a 15% stake in the newly formed group.

    Dentsu's new Shiodome Head Office Building opens in November.

  • 2003

    Dentsu East Japan Inc., Ad Dentsu Tokyo Inc. and Dentsu Tohoku Inc. merge, with Dentsu East Japan as the surviving company.

  • 2004

    Tateo Mataki becomes the President & CEO.

    Dentsu Group initiates the UNESCO World Terakoya Movement "kururimpa" project.

  • 2005

    Dentsu Group obtains BS7799 certification and Information Security Management Systems (ISMS) certification.

    All of Dentsu's domestic branch offices receive ISO 14001:2004 certification.

  • 2006

    Dentsu Tec is converted to a wholly-owned subsidiary, and its shares are delisted.

  • 2007

    Dentsu Group achieves consolidated billings (net sales) of 2 trillion yen.

    Tateo Mataki becomes the third Chairman. Tatsuyoshi Takashima becomes the eleventh President. 

  • 2008

    Dentsu establishes an internal committee for the deliberation of environment-related strategies.

    Dentsu receives "Eco-First Company" certification.

  • 2009

    Dentsu announces the new Dentsu Group corporate philosophy: "Good Innovation."

    Dentsu Announces New Medium-Term Management Plan "Dentsu Innovation 2013".

  • 2011

    Tatsuyoshi Takashima becomes the fourth Chairman. Tadashi Ishii becomes the twelfth President & CEO.

  • 2012

    Dentsu establishes the Dentsu Network, an umbrella organization of the Company's agencies outside Japan.

  • 2013

    Dentsu acquires Aegis Group plc and establishes a new global operating unit, Dentsu Aegis Network Ltd., in London.

  • 2014

    Dentsu Appointed as Marketing Agency by the Tokyo Organising Committee of the Olympic and Paralympic Games.

  • 2017

    Toshihiro Yamamoto becomes the thirteenth President & CEO.