Koei
| Company type | Public |
|---|---|
| Industry | Video games |
| Founded | July 1978 |
| Founder | Yoichi Erikawa, Keiko Erikawa |
| Defunct | April 1, 2010 |
| Fate | Merged with Tecmo to form Tecmo Koei Games |
| Headquarters | Yokohama , Japan |
Area served | Worldwide |
Key people | Yoichi Erikawa (founder) |
| Products | Historical simulation games, action games, otome games |
| Parent | Tecmo Koei Holdings (2009–2010) |
Koei Co., Ltd. was a Japanese company engaged in publishing, developing, and distributing video games, established in 1978. It gained recognition primarily for its historical simulation titles inspired by the novel Romance of the Three Kingdoms and other events with a pseudo-historical backdrop.
The company achieved widespread acclaim through its action games with loose historical themes, notably the Musō series, which includes Dynasty Warriors and Samurai Warriors. Additionally, Koei owned Ruby Party, a division dedicated to producing otome games.
On April 1, 2009, Koei merged with Tecmo, resulting in the creation of the holding entity Tecmo Koei Holdings. Following a year of operating as separate subsidiaries, Koei and Tecmo consolidated on April 1, 2010, forming Tecmo Koei Games, with Koei as the surviving legal entity.
History
Founded in July 1978 by (also known as ) alongside Keiko Erikawa, Koei began its journey with Yoichi—a former Keio University student who transitioned from his family’s unsuccessful dye business into programming. The company’s headquarters remain located in Yokohama’s Hiyoshi district.
Initially concentrating on personal computer sales and bespoke software development, Koei launched the erotic role-playing adventure Seduction of the Condominium Wife in 1982. This title leveraged the PC-8001’s eight-color display capabilities and became highly successful, establishing Koei as a leading software developer. That same year, they released Underground Exploration, recognized as one of Japan’s earliest role-playing games. In 1983, Koei introduced Nobunaga's Ambition, a strategic historical game set during Japan’s Sengoku era that earned several accolades. The firm further expanded its portfolio of historically themed games with series such as Romance of the Three Kingdoms and Uncharted Waters, which is set during Portugal’s Age of Discovery.
In 1988, Koei launched its North American branch based in California to localize and develop titles for overseas markets under designer Stieg Hedlund. Prominent releases during this period included Liberty or Death, Celtic Tales: Balor of the Evil Eye, Gemfire, and Saiyuki: Journey West. After Hedlund left in 1995, the subsidiary shifted its emphasis primarily toward localization, sales, and marketing efforts.
Although Koei’s historical simulation games did not reach mass-market popularity, they maintained a loyal niche audience that contributed to consistent profitability through dependable sales projections.
The company continued expanding globally by establishing subsidiaries in Canada (2001), Europe (2003), China, Korea, Taiwan, Lithuania, and Singapore—the latter supporting development for projects like Sangokushi Online.
Ruby Party focuses on 'Neoromance' otome dating simulations enriched with side quests. Its flagship franchises include Angelique (debuting in 1994) and Harukanaru Toki no Naka de, which has spawned numerous sequels alongside an anime adaptation. Another notable success is Kin'iro no Corda, which gained additional popularity through its manga licensing by Viz and an anime broadcast starting October 2006; its sequel was released for PlayStation 2 in March 2007.
In September 2008, Koei initiated merger discussions with financially troubled rival Tecmo. By November, both companies agreed to unite on April 1, 2009, forming Tecmo Koei Holdings, with regulatory approval granted on January 26, 2009.
Subsequently on April 1, 2010, Koei officially absorbed Tecmo to establish Tecmo Koei Games. Subsidiaries across the United States, Europe, and Korea adopted new branding earlier that year. Development divisions were separated into distinct subsidiaries—Koei Co. Ltd. and Tecmo Co. Ltd.—on March 15, 2010; these were fully integrated under Tecmo Koei Games by April 1, 2011. On July 1, 2014, Tecmo Koei Games was renamed Koei Tecmo Games.
See also
External links
- Articles with short description
- Companies located in Yokohama
- Japanese video game companies no longer operating
- Video game firms founded in 1978
- Koei Tecmo
- Video game publishers
- Video game developers
- Japanese enterprises founded in 1978
- Video game companies closed in 2010
- Japanese businesses closed in 2010
- Japanese companies disestablished in 2010