Sega Corporation is a Japanese video game company and subsidiary of Sega Sammy Holdings headquartered in Tokyo. It produces several multi-million-selling game franchises for arcades and consoles, including Sonic the Hedgehog, Angry Birds, Phantasy Star, Puyo Puyo, Super Monkey Ball, Total War, Virtua Fighter, Megami Tensei, Sakura Wars, Persona, The House of the Dead, and Yakuza. From 1983 until 2001, Sega also developed its own consoles.
Sega was founded by Martin Bromley and Richard Stewart in Hawaii as Nihon Goraku Bussan on June 3, 1960. Shortly after, it acquired the assets of its predecessor, Service Games of Japan. In 1965, it became known as Sega Enterprises, Ltd., after acquiring Rosen Enterprises, an importer of coin-operated games. Sega developed its first coin-operated game, Periscope, in 1966. Sega was sold to Gulf and Western Industries in 1969. 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, with backing from CSK Corporation.