ABOUT
Sep. 1943
  Nikkei Kokoku-sha, the forerunner of Nihon Keizai Advertising Co., Ltd. established in Nagoya
Mar. 1947
  Yoshinobu Niwa established Nihon Keizai Advertising Co., Ltd.
with the capital of ¥100,000 (March 18th)
Jul. 1951
  Branch established in Nagoya
Mar. 1954
  Head office moved to 3-4, Kanda Ogawamachi
Jul. 1954
  Radio TV Media Division established
Sep. 1955
  Branch established in Shizuoka
Mar. 1956
  Started to employ new university graduates
Apr. 1958
  Head office moved to 2-2, Kanda Nishikicho
Mar. 1961
  Capital increased to ¥5,000,000
Nov. 1961
  Construction of headquarter building Nikkei Advertising Company Bldg.completed
Jul. 1962
  Plate Making Division established
Jan. 1967
  Branch established in Osaka (Daikei-sha)
Jul. 1967
  Capital increased to ¥10,000,000
Dec. 1968
  Nikkei Annai Advertising Company (now Nikkei Agency, Inc.) estblished
Dec. 1969
  Sales branch established in Saitama
Jul. 1969
  Capital increased to ¥20,000,000
Aug. 1970
  Extension and improvement of headquarter building completed
  Sales branch established in Tama
Jan. 1971
  Capital increased to ¥30,000,000
Sales branch established in Chiba
Apr. 1973
  Sales branch established in Hamamatsu
Apr. 1976
  Sales branch established in Yokohama
Jan. 1979
  Nikkei Kokoku Seihan established
Apr. 1979
  Nikkei Sangyo Advertising Agency Co., Ltd. established
Jul. 1979
  Established Nagoya branch of Nikkei Sangyo Advertising Agency Co., Ltd.
Mar. 1981
  Closed down Nagoya branch of Nikkei Sangyo Advertising Agency Co., Ltd.
and established Nagoya branch of Nihon Keizai Advertising Co., Ltd.
Jan. 1982
  Nikkei Creative Center, Inc. established
Mar. 1982
  Construction of Nihon Keizai Advertising Company's Surugadai Bldg. completed
  Head office moved to 3-6, Kanda Surugadai Chiyoda-ku
  Capital increased to ¥63,776,150
Apr. 1983
  Business Service established
Jan. 1984
  Nikkei Annai Advertising Company renamed as Nikkei Agency, Inc.
Mar. 1986
  Yoshinobu Niwa became the chairman
  Nobukazu Niwa became the president
  Capital increased to ¥89,130,300
Jan. 1991
  CI implemented and corporate brand named as ADEX
  Branch established in Kyushu
Sep. 1992
  Construction of Nihon Keizai Advertising Company's ADEX Ogawamachi Bldg. completed
Jun. 1993
  Sales branch in Tama reorganized into sales branch in Tokyo and its office moved to ADEX Ogawamachi Bldg.
Dec. 1993
  Sales branches in Tokyo, Chiba and Saitama reorganized into Tokyo sales office
Jan. 1996
  Tokyo sales office renamed as No.13 sales office
Aug. 1996
  Acquired ADEX Ichibancho Bldg.
Jan. 1997
  Yokohama branch and No.13 sales office reorganized into No.14 sales office
Feb. 1997
  TAFF Creative Co., Ltd. established
Jan. 1998
  Shizuoka branch and sales office in Hamamatsu reorganized into Tokai branch
Apr. 1998
  Construction of Nihon Keizai Advertising Company's new building completed
  Head office moved to 2-10, Kanda-Ogawamachi, Chiyoda-ku
Dec. 2002
  Extension of Nihon Keizai Advertising Company's building completed
Jan. 2005
  VI implemented
Dec. 2005
  Acquired a Privacymark
Jan. 2006
  Osaka branch renamed as Kansai branch
Mar. 2007
  ADEX DESIGN CENTER Co., Ltd. established (Nikkei Creative Center, Inc. and TAFF Creative Co., Ltd. merged)
Apr. 2007
  IT Communications Inc. established
Jun. 2007
  ZENRYOKU AGENCY Co., Ltd. established
Jan. 2013
  ADEX HOKKAIDO established
Apr. 2015
  Sales branch established in Sendai