They are also known for their work on external video game franchises, namely on Square Enix's Final Fantasy and Nintendo's Fire Emblem.

Yōichi was a student at Keio University, and when his family's rural dyestuffs business failed he decided to pursue his interest in programming.

The game went on to receive numerous awards, and Koei produced several more such games set against the backdrop of world history, including Romance of the Three Kingdoms, set during the Three Kingdoms period of Chinese history, and Uncharted Waters (大航海時代 Dai Kōkai Jidai; lit.

[10] In January 2006, Tecmo president, Junji Nakamura, resigns from the company while Yoshimi Yasuda was named his successor.

[13] This was followed by another lawsuit filed on June 16, 2008 by two plaintiffs on behalf of Tecmo's 300 employees for unpaid wages amounting to ¥8.3 million.

[14] On August 20, 2008, Tecmo announced the resignation of president Yoshimi Yasuda, to be replaced by current Chairman of the Board Yasuharu Kakihara as of September 1.

On August 28, Square Enix announced plans for a friendly takeover of Tecmo by purchasing shares at a 30 percent premium with a total bid of ¥22.3 billion.

[15][16] Upon hearing this news on August 31, Kenji Matsubara, President and COO of Koei, called a board meeting for the next day, September 1.

On September 4, 2008, Tecmo officially declined Square Enix's proposal,[18] and later that same day announced plans to merge with Koei.

[23] Effissimo Capital Management Pte, Tecmo's second-largest shareholder at 17.6%, openly opposed the merger.

[25] Effissimo's director Takashi Kosaka stated "We have not had sufficient information from the company to make a judgment on the merger, such as the feasibility of their plan to raise shareholder value.

[30] As of May 26, Tecmo Koei had still not reached an agreement with Effissimo, prompting the investment fund to seek mediation with the Tokyo District Court.

While Tecmo Koei favored a stock value in the mid-600 yen range, Effissimo was expected to ask for at least 900, in part due to the rejected Square Enix offer of 920 per share.

[46] On February 10, 2025, Koei Tecmo announced that Hisashi Koinuma, who currently serves as the representative director and executive vice president of Koei Tecmo Holdings, will replace Yoichi Erikawa as company president and CEO, effective April 1, 2025.

The move aims to strengthen governance related to investments and improve cash management across the company.

Team Tachyon is a Japanese video game development department of Koei Tecmo founded in 2007.

Similar to Team Ninja, the group was formed to develop high-profile games, some of which relate to Tecmo Koei's classic franchises.

[54] Key members include Tecmo producers Keisuke Kikuchi (Rygar, Fatal Frame) and Kohei Shibata.

[55] So far, Team Tachyon has aided in the development of the 2008 Fatal Frame IV: Mask of the Lunar Eclipse game for the Wii, 2008 Wii game Rygar: The Battle of Argus,[56] has released Undead Knights for the PlayStation Portable, and Quantum Theory for the PlayStation 3 and the Xbox 360, released in 2010.