Sega Games Co., Ltd. is a Japanese multinational video game developer and publisher headquartered in Tokyo.
The company was formed as Nihon Goraku Bussan[b] in 1960, which became known as Sega Enterprises, Ltd. after acquiring Rosen Enterprises, an importer of coin-operated games. Sega developed its first coin-operated game with Periscope in the late 1960s. In 1969, Sega was sold to Gulf and Western Industries. Following a downturn in the arcade business in the early 1980s, Sega began to develop video game consoles, starting with the SG-1000 and Master System, but struggled against competitors such as the Nintendo Entertainment System. In 1984, Sega executives David Rosen and Hayao Nakayama led a management buyout of the company with backing from CSK Corporation.