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Iiyama Corporation (株式会社イーヤマ, Kabushikigaisha īyama) is a Japanese electronics company part of Mouse Computer Corporation (株式会社マウスコンピューター MouseComputer Kabushiki Gaisha), producing liquid crystal display (LCD) monitors and LED display panels. Iiyama was founded in 1972 by Kazuro Katsuyama, named after the city of Iiyama in Nagano Prefecture, Japan. The company was bought by MCJ Corporation in 2006, of which Mouse Computer is part of. The CEO since January 2006 has been Takeichi Shinji.

Iiyama Corporation
IndustryComputer hardware, Electronics
Founded1972 in Iiyama, Japan
FounderKazuro Katsuyama
Headquarters2-7-1 Nihonbashi, Chuo-Ku, ,
Area served
Number of employees


An iiyama monitor, shown with a keyboard and mouse

Founded in March 1972 as Iiyama Electric Corporation by 23-year-old bank employee Kazuro Katsuyama, it first started manufacturing television boards and substrates for Mitsubishi at a local plant in Nagano Prefecture. They started producing black and white TVs in 1976 and color TVs in 1979, followed by computer monitors under its own brand name in 1981 which then became its main product range.

The company expanded to the western market in 1987 and in the 1990s opened up offices in Philadelphia, Germany, Poland, France, UK, Sweden, the Czech Republic, Taiwan, and its international head office in the Netherlands, where it is registered as Iiyama Benelux B.V. By 1993 it was the leading monitor supplier in Japan with a 21% market share. The first LCDs were released by iiyama in 1997.

In 2001 it merged with Eiyama to create Iyama Co., Ltd., and its headquarters moved to Nagano City. In 2006 holding company MCJ Co., Ltd. (株式会社 MCJ Kabushiki Gaisha) bought Iyama and renamed it to iiyama Co., Ltd., moving its base to Chūō, Tokyo. In October 2008 iiyama Corporation became part of Mouse Computer Co., Ltd., one of MCJ's companies.

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