Established on December 2, 1981, System Sacom Corp. (株式会社システムサコム) was a hardware and software company in Tokyo. It withdrew from the game industry in 1998 and focused on its hardware business. Sacom was responsible for the "Novel Ware" series of adventure games that influenced the sound novel and visual novel genres. Some may also remember the company for its interactive movie games such as Mansion of Hidden Souls and Lunacy.

Sacom was a member of DOG (Disk Original Group), a coalition of companies led by Square that produced games for the Famicom Disk System, and a similar group called Super Software Team, made up of several computer game makers. It was also involved with Scap Trust, a joint venture with seven other software companies.

Yukio Horimoto, creator of Märchen Veil, started Infinity in 1986. Sacom's business software division broke away and became System Sacom Business (later SSB) in 1990. In 1998, Masaharu Inoue founded what is now Ivy-Arts (originally Media Jungle, then Jungle). Umihara Kawase creator Kiyoshi Sakai and character designer Toshinobu Kondo were former Sacom employees.