Imagineer Co., Ltd. was established on January 27, 1986 (registered on June 1, 1977) in Shinjuku-ku, Tokyo, with the goal of developing, manufacturing and selling game software. They acquired the rights to release overseas games in Japan, such as SimCity which they published for PC. They have also worked with companies like Sanrio Co., Ltd. on games featuring popular characters such as Hello Kitty.

Imagineer developed the Super Nintendo Entertainment System version of Populous, having acquired the rights from Les Edgar. At the time, the company was working with Nintendo. Imagineer also publishes the Medabots game series.

In 2016, Imagineer fully absorbed their video game subsidiary company, Rocket Company, merging into one company.