株式会社電通

光永星郎、日本広告株式会社を設立。4ヵ月後、電報通信社を併設。

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

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

日本電報通信社が日本広告株式会社を合併。通信・広告の併営となる。

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

社長制を導入。光永星郎専務が初代社長に就任。

本社新社屋（現・電通銀座ビル）完成。

「電聯合併」。通信部門を同盟通信社に移譲。広告専業となる。

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

光永眞三専務が第2代社長に就任。

Shinzo Mitsunaga becomes the second President.

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

上田碩三元常務が第3代社長に就任。

Sekizo Ueda becomes the third President.

吉田秀雄常務が第4代社長に就任。

Hideo Yoshida becomes the fourth President.

Creation of the Dentsu Advertising Awards.

Creation of the Dentsu Advertising Essay Contest for Students.

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

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

社名を株式会社電通（DENTSU ADVERTISING LIMITED）に変更。

Dentsu Advertising Ltd. becomes the new company name.

Tsuneji Hibino becomes the fifth President.

Completion of Tsukiji Head Office Building.

Yoshichika Nakahata becomes the sixth President.

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

Hideharu Tamaru becomes the seventh President.

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.

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

Gohei Kogure becomes the eighth President.

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

Fiscal 1989 billings exceed 1 trillion yen.

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

Dentsu establishes five domestic regional subsidiaries.

Japan-China Advertising Education Exchange Project commences. Dentsu Tec Inc. is established.

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.

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

Dentsu commemorates its 100th anniversary.

ピュブリシス・グループに資本参加。

成田社長が第2代会長に、俣木盾夫副社長が第10代社長に就任。

経営ビジョン「価値創造パートナー」を発表。

東京・汐留に新社屋ビル完成。

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.

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

Geneon Entertainment Inc. and Geneon Entertainment (USA) Inc. are converted to subsidiaries.

Tateo Mataki becomes the President & CEO.

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

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

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

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

俣木社長が第3代会長に、髙嶋達佳副社長が第11代社長に就任。

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

Tateo Mataki becomes the third Chairman.

Tatsuyoshi Takashima becomes the eleventh President.

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

Dentsu receives 'Eco-First Company' certification.

電通グループの新企業理念「Good Innovation.」を発表。

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

Dentsu introduces the 'Director, Member of the Board & Executive Officer' management system.

cyber communications inc. becomes a wholly-owned subsidiary.

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

欧州・米州事業を管轄する「電通ネットワーク・ウエスト」を設置。

Dentsu establishes Dentsu Digital Holdings.

Dentsu establishes Dentsu Network West.

髙嶋社長が第4代会長に、石井直専務が第12代社長に就任。

Tatsuyoshi Takashima becomes the fourth Chairman.

Tadashi Ishii becomes the twelfth President & CEO.

「電通ネットワーク・ウエスト」を吸収統合した海外事業統括組織「電通ネットワーク」を設置。

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

Dentsu Network West is absorbed into the Dentsu Network.

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

東京オリンピック・パラリンピック競技大会組織委員会が マーケティング専任代理店として電通を指名。

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

山本敏博常務が第13代社長に就任。

Toshihiro Yamamoto becomes the thirteenth President & CEO.

純粋持株会社制に移行し、山本敏博が株式会社電通グループの初代社長に就任。

株式会社電通の第14代社長に五十嵐博が就任。

Transitioned to a new holding company structure, and Toshihiro Yamamoto became the first appointed to Dentsu Group Inc.

Hiroshi Igarashi was appointed the 14th President of Dentsu Inc.