Last updated
SCSK Corporation
Native name
Romanized name
Kabushiki gaisha Esu-Shī-Esu-Kei
Sumitomo Computer Service Corporation (1969-2005)
Sumitomo Computer System Corporation (2005-2011)
Kabushiki gaisha
Traded as TYO: 9719
ISIN JP3400400002  OOjs UI icon edit-ltr-progressive.svg
Revenue¥323.9 billion
Total assets ¥21.1 billion
Number of employees
11,910 (2017)
Parent Sumitomo Corporation
Subsidiaries CRI Middleware

SCSK Corporation(株式会社SCSK,Kabushiki gaisha Esu-Shī-Esu-Kei) is a Japanese company headquartered in Tokyo, Japan. It offers Information Technology services and produces computer software. CSK is best known as the company that acquired Sega in 1984 and was its parent company until it sold its stock in Sega to Sammy in 2004. Through the transference of shares, Sega Sammy Holdings was established. [1]

Tokyo Capital of Japan

Tokyo, officially Tokyo Metropolis, is one of the 47 prefectures of Japan. It has served as the Japanese capital since 1869, its urban area housing the Emperor of Japan and the Japanese government. Tokyo forms part of the Kantō region on the southeastern side of Japan's main island, Honshu, and includes the Izu Islands and Ogasawara Islands. Tokyo was formerly named Edo when Shōgun Tokugawa Ieyasu made the city his headquarters in 1603. It became the capital after Emperor Meiji moved his seat to the city from Kyoto in 1868; at that time Edo was renamed Tokyo. The Tokyo Metropolis formed in 1943 from the merger of the former Tokyo Prefecture and the city of Tokyo. Tokyo is often referred to as a city but is officially known and governed as a "metropolitan prefecture", which differs from and combines elements of a city and a prefecture, a characteristic unique to Tokyo.

Japan Island country in East Asia

Japan is an island country in East Asia. Located in the Pacific Ocean, it lies off the eastern coast of the Asian continent and stretches from the Sea of Okhotsk in the north to the East China Sea and the Philippine Sea in the south.

Sega Japanese video game developer and publisher and subsidiary of Sega Sammy Holdings

Sega Games Co., Ltd. is a Japanese multinational video game developer and publisher headquartered in Shinagawa, Tokyo. Its international branches, Sega of America and Sega Europe, are respectively headquartered in Irvine, California and London. Sega's arcade division, once part of Sega Corporation, has existed as Sega Interactive Co., Ltd. since 2015. Both companies are subsidiaries of Sega Holdings Co., Ltd., which is in turn a part of Sega Sammy Holdings. From 1983 until 2001, Sega also developed and sold video game consoles.



In 1969, Sumitomo Computer Service Corporation was established by Sumitomo Corporation. [2] In 2005, Sumitomo Computer Service Corporation and Sumitomo Electronics Corporation were merged and the company name was changed to Sumitomo Computer System Corporation.

Sumitomo Corporation is one of the largest worldwide Sogo shosha general trading companies, and is a diversified corporation. The company was incorporated in 1919 and is a member company of the Sumitomo Group.

Separately, CSK Corporation was established by Japanese entrepreneur, Isao Okawa [3] in 1968. The acronym CSK was derived from "Computer Service". In the 2000s, CSK failed in real estate investing, resulting in a large deficit after Okawa died in 2001. [4] [ clarification needed ] CSK also established CSK Research Institute in 1983, which was later known as CRI Middleware.

Isao Okawa was a Japanese businessman and the former Chairman of Sega.

CRI Middleware

CRI Middleware Co., Ltd. is a Japanese developer providing middleware for use in the computer and video game industry. From the early nineties, CRI was a video game developer, but shifted focus in 2001.

In April 2011, Sumitomo Corporation acquired CSK Corporation through a takeover. In October 2011, Sumitomo Computer System Corporation and CSK Corporation went through a statutory merger, in which Sumitomo Computer System absorbed CSK Corporation and was re-branded SCSK Corporation. [5]

In business, a takeover is the purchase of one company by another. In the UK, the term refers to the acquisition of a public company whose shares are listed on a stock exchange, in contrast to the acquisition of a private company.


The company offers the services of system integration, cloud computing, information security and produces computer software in Japan, mostly on a B2B basis for enterprises. SCSK Corporation's business type and scope is similar to those of Itochu Techno-Solutions, Uniadex and Mitsui Knowledge Industry, which also specialize in IT services. The company has been listed on the Tokyo Stock Exchange (9719.TYO) since 1989, initially as Sumitomo Computer Service Corp. [6]

System integration is defined in engineering as the process of bringing together the component sub-systems into one system and ensuring that the subsystems function together as a system, and in information technology as the process of linking together different computing systems and software applications physically or functionally, to act as a coordinated whole.

Cloud computing Form of Internet-based computing that provides shared computer processing resources and data to computers and other devices on demand

Cloud computing is the on-demand availability of computer system resources, especially data storage and computing power, without direct active management by the user. The term is generally used to describe data centers available to many users over the Internet. Large clouds, predominant today, often have functions distributed over multiple locations from central servers. If the connection to the user is relatively close, it may be designated an edge server.

Information security, sometimes shortened to infosec, is the practice of protecting information by mitigating information risks. It is part of information risk management. It typically involves preventing or at least reducing the probability of unauthorized/inappropriate access, use, disclosure, disruption, deletion/destruction, corruption, modification, inspection, recording or devaluation, although it may also involve reducing the adverse impacts of incidents. Information may take any form, e.g. electronic or physical., tangible or intangible. Information security's primary focus is the balanced protection of the confidentiality, integrity and availability of data while maintaining a focus on efficient policy implementation, all without hampering organization productivity. This is largely achieved through a structured risk management process that involves:

See also

Related Research Articles

SG-1000 video game console manufactured by Sega

The SG-1000 is a home video game console manufactured by Sega and released in Japan, Australia, New Zealand, and other regions. It was Sega's first entry into the home video game hardware business. Introduced in 1983, the SG-1000 was released on the same day that Nintendo released the Family Computer in Japan. The SG-1000 was released in several forms, including the SC-3000 computer and the redesigned SG-1000 II released in 1984. A third iteration of the console, the Sega Mark III, was released in 1985. It provided a custom video display processor over previous iterations and served as the basis for the Master System in 1986, Sega's first internationally-released console.

Asmik Ace, Inc., formerly Asmik Ace Entertainment, Inc. is a Japanese film production and distribution company. In past, the company has distributed video games. It was formed in 1997 through a merger between the Asmik Corporation and Ace Entertainment, both of Japan. The name Asmik comes from its three founding companies: Ask, Sumitomo and Kodansha. The company is headquartered on the third floor of the Lapiross Roppongi building in Minato, Tokyo, and is a wholly owned division of Jupiter Telecommunications (J:COM).

NEC Japanese technology corporation

NEC Corporation is a Japanese multinational information technology and electronics company, headquartered in Minato, Tokyo, Japan. The company was known as the Nippon Electric Company, Limited, before rebranding in 1983 as NEC. It provides IT and network solutions to business enterprises, communications services providers and to government agencies, and has also been the biggest PC vendor in Japan since the 1980s with the PC-8000 series.

Atlus Co., Ltd. is a Japanese video game developer, publisher and distribution company based in Tokyo, and a subsidiary of Sega. As a video game company, it is best known for developing the Megami Tensei, Persona, Etrian Odyssey and Trauma Center series. Its corporate mascot is Jack Frost, a snowman-like character from their Shin Megami Tensei series. Beyond video games, it is known for the Purikura, which are selfie photo sticker booths popular in East Asia.

Sumitomo Mitsui Banking Corporation

Sumitomo Mitsui Banking Corporation is a Japanese multinational banking and financial services company headquartered in Yurakucho, Chiyoda, Tokyo, Japan. It is a wholly owned subsidiary of Sumitomo Mitsui Financial Group. SMBC is the second largest bank in Japan by assets.

Sega Sammy Holdings Inc. is a Japanese consolidated holding company & conglomerate formed from the merger of Sega and Sammy in 2004. Both companies are involved in the amusement industry.

ASCII Corporation was a publishing company based in Tokyo, Japan. It became a subsidiary of Kadokawa Group Holdings in 2004, and merged with another Kadokawa subsidiary MediaWorks on April 1, 2008, and became ASCII Media Works. The company published Monthly ASCII as the main publication.

Sammy Corporation is a developer and retailer of pachinko and pachislot systems in South Korea & Japan that was established on November 1, 1975 as Sammy Industry. The company is also known for publishing a small number of video games such as the Guilty Gear, The Rumble Fish and Survival Arts series of fighting games. In 2004, it merged with Sega to form a new holding company called Sega Sammy Holdings Inc. All the video game businesses were transferred over to Sega.

David Rosen is an American businessman and the co-founder of the Japanese video game company Sega. He retired from the company as Chairman in 1996.

Hayao Nakayama is a Japanese businessman and was the former President and CEO of Sega Enterprises, Ltd from 1983 to 1999.

TMS Entertainment Japanese animation studio

TMS Entertainment Co., Ltd., formerly known as Tokyo Movie Shinsha, also known as Tokyo Movie or TMS-Kyokuichi, is a Japanese animation studio founded in 1964.

Uniadex Ltd. is a Japanese company headquartered in Tokyo, Japan, that offers IT services.

NS Solutions IT service company

NS Solutions Corp. is a Japanese company headquartered in Tokyo, Japan, that offers IT services.

Mitsui Knowledge Industry IT service company

Mitsui Knowledge Industry Co., Ltd.' is a Japanese company headquartered in Tokyo, Japan, that offers IT services.

Sony Global Solutions Inc., also known as SGS, is a Japanese company headquartered in Tokyo, Japan, that offers IT services.

Canon IT Solutions Inc., is a Japanese company headquartered in Tokyo, Japan, that offers IT services.

History of Sega The history of Sega, a Japanese video game company and subsidiary of [[Sega Sammy Holdings]]

The history of Sega, a Japanese multinational video game developer and publisher, has roots back to Standard Games in 1940 and Service Games of Japan in the 1950s. The formation of the company known today as Sega is traced back to the founding of Nihon Goraku Bussan, which became known as Sega Enterprises, Ltd. following acquisition of Rosen Enterprises in 1965. Originally an importer of coin-operated games to Japan and manufacturer of slot machines and jukeboxes, Sega began developing its own arcade games in 1966 with Periscope, which became a surprise success and led to more arcade machine development. In 1969 Gulf and Western Industries bought Sega, which continued its arcade game business through the 1970s.


  1. "Sammy to Buy Sega for $1.8 Billion". The Wall Street Journal. 2004-05-09. Retrieved 2017-12-16.
  2. "SCSK". Bloomberg. Retrieved 2017-07-10.
  3. "Isao Okawa". Nikkei Business (Japanese). Retrieved 2017-07-10.
  4. "Sumitomo Corporation Acquisition of CSK". Toyo Keizai (Japanese). Retrieved 2017-07-10.
  5. "Sumitomo Computer System and CSK Merger". Impress (Japanese). Retrieved 2017-07-10.
  6. "SCSK". Bloomberg. Retrieved 2017-07-10.