Headquarters moved to newly constructed office building in Osaka.
1981
March
The KONAMI logo was established.
1982
March
KONAMI received an investment from Osaka Small and Medium Business Investment & Consultation Co., Ltd. and increased its capital to 120 million yen.
Headquarters moved to Osaka Ekimae Daiyon Building in Kita-ku, Osaka.
October
KONAMI expanded into the PC game business.
November
Konami of America, Inc. (currently Konami Digital Entertainment, Inc.) was established in the United States.
1983
November
Capital increased to 300 million yen.
December
KONAMI expanded into the MSX game business.
1984
March
The new Technology Development Center building was established in Osaka.
May
Konami Ltd. (currently Konami Digital Entertainment B.V.) was established in the United Kingdom.
October
KONAMI was listed on the Second Section of the Osaka Securities Exchange (specially designated stocks in the second section). Capital increased to 2,940 million yen.
December
Konami GmbH (currently Konami Digital Entertainment B.V) was established in Germany.
KONAMI expanded into the Nintendo ENTERTAINMENT SYSTEM (called "FAMILY COMPUTER" in Japan) game business.
1985
November
Capital increased to 5,227 million yen.
1986
August
A new corporate identity was introduced. The new KONAMI logo was established.
Headquarters moved to the newly constructed Konami Software Development Building in Chuo-ku, Kobe.
October
The new Production Control Department and Distribution Center was established in Osaka.
November
Capital increased to 8,095 million yen.
1987
December
Konami Kosan Co., Ltd. (currently Konami Real Estate, Inc.) was established.
1988
February
KONAMI was listed on the Second Section of the Tokyo Stock Exchange.
August
KONAMI was listed on the First Section of the Tokyo Stock Exchange and the Osaka Securities Exchange.
KONAMI became the first Japanese company to enter the world's largest gaming machines market in the United States.
March
Capital increased to 15,793million yen.
July
The corporate name was changed from KONAMI CO., LTD. to KONAMI CORPORATION.
November
KONAMI announced a new type of financial product called "Game Fund Tokimeki Memorial".
2001
February
PEOPLE CO., LTD. (currently Konami Sports Co., Ltd.), became a KONAMI subsidiary through a friendly TOB (take over bid) and KONAMI expanded into the Sports business.
March
Capital increased to 47,399 million yen.
August
Acquired capital in Hudson Soft Company, Limited, making it an affiliated company.
2002
March
KONAMI launched e-amusement (an online service for arcade machines).
April
KONAMI's sports venues assumed the new title of "Konami Sports Club".
August
Headquarters moved to the Marunouchi Building in Chiyoda-ku, Tokyo.
September
KONAMI was listed on the New York Stock Exchange.
2003
April
KONAMI introduced a new logo on the occasion of the 30th anniversary of the company's establishment.
October
KONAMI was added to the Nikkei Stock Average (Nikkei 225).
The new office and production facility for gaming machines was built in Las Vegas, Nevada, United States.
2006
February
Internet Revolution, Inc. was established as a joint venture company with Internet Initiative Japan Inc.
March
Konami Digital Entertainment Co., Ltd. was newly established to take over KONAMI's digital entertainment business and KONAMI CORPORATION shifted to a pure holding company.
August
KPE, Inc. started distributing pachinko slot machines.
2007
April
Headquarters moved to Tokyo Midtown in Minato-ku, Tokyo.
2008
August
Three athletes from Konami Sports Gymnastic and Swimming Team represented Japan's national squad in the 29th Olympic Games (2008/Beijing), winning medals in top places.
September
KONAMI entered into a licensing agreement with the Union of European Football Associations (UEFA) to produce and sell football (soccer) games.
KONAMI made ABILIT CORPORATION (currently TAKASAGO ELECTRIC INDUSTRY CO., LTD.) a wholly-owned subsidiary through a share exchange.
March
Konami Sports Club Sendai Nagamachi was hit by the Great East Japan Earthquake.
September
KONAMI acquired land accompanied by a building in Ichinomiya, Aichi (currently the Konami Group Ichinomiya Office).
December
Konami Digital Entertainment Co., Ltd. was selected as a recipient of a Thomson Reuters 2011 Top 100 Global Innovator Award.
2012
March
Konami Digital Entertainment Co., Ltd. absorbed Hudson Soft Company, Limited.
June
Takuya Kozuki assumed the position of President and Representative Director of KONAMI CORPORATION.
July
Four athletes from Konami Sports Gymnastic and Swimming Team represented Japan's national squad in the 30th Olympic Games (2012/London), winning a total of 6 medals including the gold medal in the men's individual all-around gymnastics event.
2013
April
Konami Digital Entertainment B.V. was relocated in Windsor, U.K., as the European headquarters.
June
KONAMI acquired land for Konami Creative Center Ginza in Chuo-ku, Tokyo.
October
The groundbreaking ceremony for the second Gaming & Systems Business Factory was held in Las Vegas, Nevada, United States.
2014
January
KONAMI was selected for inclusion in the "JPX-Nikkei Index 400."
June
TAKASAGO ELECTRIC INDUSTRY CO., LTD. began sales of pachinko machines.
August
Konami Sports Club Dancing Stars’ selected team "J.B.STAR" won the international dance competition "WORLD HIPHOP CHAMPIONSHIP 2014."
October
KONAMI celebrated its 30th listing anniversary on the stock exchange in Japan.
2015
March
Konami Business Expert Co., Ltd. was established.
September
The second Gaming & Systems Business Factory was established in Las Vegas, Nevada, United States.
October
KONAMI CORPORATION changed its trade name to KONAMI HOLDINGS CORPORATION.
October
Konami Sports & Life Co., Ltd. changed its trade name to Konami Sports Club Co., Ltd.
2016
April
Konami Sports Club Kumamoto was hit by the 2016 Kumamoto earthquake.
August
Six athletes from Konami Sports Gymnastics and Swimming Teams represented Japan's national squad in the 31st Olympic Games (2016/Rio de Janeiro), winning a total of 5 medals including the gold medal in the men’s team all-around gymnastics event.
November
KONAMI carried out a business restructuring of group companies, in the course of which Konami Amusement Co., Ltd. was established.
2017
August
Konami Digital Entertainment Co., Ltd. held the Japanese eSports competition “Pawapuro Championships 2017” as an officially recognized tournament of Nippon Professional Baseball (NPB).
2018
January
Konami Amusement (Thailand) Co., Ltd., the local subsidiary in the Kingdom of Thailand, was established.
June
Approximately 20 facilities, including Konami Sports Club Ibaraki and Kourien, were hit by the 2018 Osaka earthquake.
July
Konami Digital Entertainment Co., Ltd. and Nippon Professional Baseball (NPB) decided to jointly host the eBASEBALL League with all 12 NPB teams.
September
"Winning Eleven 2018" (overseas title: “PRO EVOLUTION SOCCER 2018”) was selected as Japan’s only esports title to be played at the "18th Asian Games Jakarta-Palembang 2018," which was subsequently held.
2019
March
Konami Sports Club Co., Ltd. changed its trade name to Konami Sports Co., Ltd.
October
With "eFootball Winning Eleven 2020" (overseas title: "eFootball PES 2020") as the competition title, the Inter-Prefectural Esports Championship 2019 IBARAKI, which is part of the Culture Program of the 74th National Sports Festival, Iki Iki Ibaraki Yume Kokutai ("Active Ibaraki Dream National Sports Festival"), was held in Tsukuba, Ibaraki.
December
KONAMI commenced its operations at the "Konami Creative Center Ginza" located in Chuo-ku, Tokyo.
esports GINZA studio within Konami Creative Center Ginza started its operation as an esports facility, with the holding of the eBASEBALL Pro League 2019 season, the eClimax Series, and the eNippon Series co-hosted with Nippon Professional Baseball.
April
Kimihiko Higashio assumed the position of President and Representative Director of KONAMI HOLDINGS CORPORATION.
June
The registered Head Office was transferred to 1-11-1, Ginza, Chuo-ku, Tokyo.
Headquarters moved to newly constructed office building in Osaka.
The KONAMI logo was established.
Headquarters moved to Osaka Ekimae Daiyon Building in Kita-ku, Osaka.
The new Technology Development Center building was established in Osaka.
KONAMI was listed on the Second Section of the Osaka Securities Exchange (specially designated stocks in the second section).
A new corporate identity was introduced. The new KONAMI logo was established.
Headquarters moved to the newly constructed Konami Software Development Building in Chuo-ku, Kobe.
The new Production Control Department and Distribution Center was established in Osaka.
KONAMI was listed on the First Section of the Tokyo Stock Exchange and the Osaka Securities Exchange.
Konami Technology Development Center (currently Kobe Technical Center) was established in Nishi-ku, Kobe.
Headquarters moved to Minato-ku, Tokyo.
The Tokyo Technical Center was established in Zama, Kanagawa. 
The Kobe Building in Chuo-ku, Kobe was damaged due to the Great Hanshin-Awaji Earthquake.
The Amusement Machine Division Plant (merged with the current Kobe Technical Center) was established in Nishi-ku, Kobe.
The KONAMI logo was changed from italics to plain text.
KONAMI was listed on the London Stock Exchange.
Headquarters moved to the Marunouchi Building in Chiyoda-ku, Tokyo.
KONAMI was listed on the New York Stock Exchange.
KONAMI introduced a new logo on the occasion of the 30th anniversary of the company's establishment.
The new office and production facility for gaming machines was built in Las Vegas, Nevada, United States.
Internet Revolution, Inc. was established as a joint venture company with Internet Initiative Japan Inc.
Headquarters moved to Tokyo Midtown in Minato-ku, Tokyo.
The groundbreaking ceremony for the second Gaming & Systems Business Factory 
The second Gaming & Systems Business Factory was established in Las Vegas, Nevada, United States.
KONAMI carried out a business restructuring of group companies, in the course of which Konami Amusement Co., Ltd. was established.