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Irem Software Engineering Inc.
Irem Software Engineering Inc.'s company logo.
EstablishedApril, 1997
LocatedFukudome, Hakusan, Ishikawa, Japan
Websitehttp://www.irem.co.jp/
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Irem (アイレム?) is a Japanese video game console developer and publisher, and formerly a developer and manufacturer of arcade games as well. They are probably best known for the famous scrolling shooter R-Type. They have been a popular developer in Japan with games like Photoboy for the PC Engine and In the Hunt for the Sega Saturn.

Irem's ancestor was founded in 1969 by Kenzo Tsujimoto in Osaka Prefecture. Tsujimoto opened his store in Osaka to sell machines for cotton candy stores. At the time, Tsujimoto was already confident in the potential of the game entertainment and started including the manufacturing of pachinko machines to his business as early as 1970.

The success of the store led to the creation in 1974 of IPM Co Ltd, with Tsujimoto as its president. "IPM" stood for International Playing Machine. At first, IPM's purpose was to built and install gaming machines for Mom-and-pop candy stores in Japan and its initial vocation wasn't much different from Tsujimoto's previous venture.

With Breakout and its various clones dominating the video game scene, IPM started to manufacture, sell, and rent arcade hardware cabinets. In 1977, IPM partnered with Nanao Corporation of Ishikawa Prefecture to produce CRT monitors for its arcade cabinets.

IPM released its first video arcade games in 1978, starting with IPM Invader (a clone of Taito's legendary Space Invaders). In early 1979, IPM changed its name to Irem Corporation following a letter from IBM Corporation that the name "IPM" was too confusing. Irem is an abbreviation for "International Rental Electronics Machines". In 1980, Nanao became the majority shareholder of Irem Corporation.

Tsujimoto remained chairman of Irem Corporation in the early 1980s despite establishing in 1979 another company, I.R.M Corporation (the precursor of Capcom). However, Tsujimoto was blamed in 1982 for the declining sales of the video game IPM Invader and other lackluster titles, and was replaced by Nanao president Tetsushi Takashima. The following year, Tsujimoto left the company to form Capcom.

In 1989, an office was inaugurated in Redmond, Washington as Irem America. It remained in operation until the restructuring of the Japanese parent company in 1994.

In 1994, Irem completely ceased development of video games. The development department of Irem Corporation was transferred to Nanao's headquarters in Ishikawa Prefecture. The company's original wholesale division, in charge of manufacturing and renting/selling arcade cabinets, stayed in Osaka and was not impacted by the company's restructuring. Then, a group of employees from Irem's video game division, left to form their own company under the name Nazca Corporation, which became best known for developing SNK's Metal Slug franchise.

In late 1996, Irem released the video game Gussun Paradise (ぐっすんぱらだいす) for the PlayStation. Although this was the company's first video game in two years, this would also be the very last video game ever from Irem Corporation.

On April 15, 1997, Nanao founded Irem Software Engineering Inc. Shortly after in July 1997, Irem Software Engineering took over the development department of Irem Corporation and absorbed it.

With the video game business gone to the new Irem Software Engineering, Irem Corporation was left with only its longtime arcade equipment division. In 1997, Nanao sold Irem Corporation to Yubis Corporation. In 1998, Irem Corporation was renamed Apies Corporation Ltd to avoid confusing the company with Irem Software Engineering. Ownership of Apies changed hands in 1999, when Yubis sold the company to Atlus. Atlus finally sold its shares of Apies in 2001 for 1 000 yen. Apies has been an independent company since then. With the decline of amusement equipment, Apies leading products, as of 2016, are fortune-telling machines and vending machines. The company is now located in Wakō, Saitama.

Since its inception in 1997, Irem Software Engineering has developed and published, under the Irem trademark, video games in Japan mainly for the various PlayStation and Nintendo platforms. Irem Software Engineering owns the rights to the video games that were produced by Irem Corporation and has continued the legacy of some franchises such as R-Type and Spelunker. In contrast to Irem Corporation, Irem Software Engineering has never released any arcade video games. Irem has largely abandoned in the 2010s the development of console video games in favor of software games based on pachinko machines. The company had long been based in Hakusan but moved in 2010 to Chiyoda, Tokyo. It is a wholly owned subsidiary of Eizo Corporation (formerly Nanao).