• 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.

  • 2022

    In June, Dentsu International’s Global CEO, Wendy Clark, and Global CCO Fred Levron announced the launch of Dentsu Creative at Cannes Lions. Dentsu Creative is an entirely new global creative network, uniting all the agencies within Creative (e.g. dentsuMB, Isobar, and dentsu branded creative agencies).