Over the years, the manga series has been adapted into the following: three anime films—Ghost in the Shell, Ghost in the Shell 2: Innocence, and Ghost in the Shell: Stand Alone Complex Solid State Society; and two anime television series—Ghost in the Shell: Stand Alone Complex and Ghost in the Shell: Stand Alone Complex 2nd Gig; all produced by Production I.G, along with one PlayStation game, one PlayStation 2 game, and one PlayStation Portable game.
Ghost in the Shell is a futuristic police thriller dealing with the exploits of Motoko Kusanagi, a member of the covert operations section of the Japanese National Public Safety Commission, Section 9, which specializes in fighting technology-related crime. She may be named after one of the three Imperial Regalia of Japan and Shirow makes reference to them at the end of the second manga. Although supposedly equal to all other members, Kusanagi fills the leadership role in the team, and is usually referred to as "the Major" due to her past rank in the armed forces. She is capable of superhuman feats, and bionically specialized for her job — her body is almost completely mechanized; only her brain and a segment of her spinal cord are organic.
The setting of Ghost in the Shell is cyberpunk or postcyberpunk, similar to that of William Gibson's Sprawl trilogy. More than other cyberpunk authors, however, Shirow focuses more on the ethical and philosophical ramifications of the widespread merging of humanity and technology, the development of artificial intelligence and an omnipresent computer network set the stage for a reevaluation of human identity and uniqueness. Kusanagi and her colleagues face external threats and also suffer internal conflict over their own natures.
The series was first adapted into a theatrical anime film adaptation in 1995, entitled Ghost in the Shell, directed by Mamoru Oshii. The film was followed by another theatrical movie sequel, Ghost in the Shell 2: Innocence, produced in 2004, which was also directed by Oshii and places the character of Batou in the lead role. A third film, Ghost in the Shell: S.A.C. Solid State Society, was created after the TV series and directed by Kenji Kamiyama. This film, however, is based on the TV storyline and does not connect with either of Oshii's works.
The original film was redone in 2008, updating the computer graphics and re-recording the sound in 6.1 surround sound. The new version premiered on the 12th of July in Japan.
As of 2008, DreamWorks acquired the rights to produce a live-action film adaptation of the original manga with Steven Spielberg tipping the scales in DreamWorks' favor. So far, Avi Arad and Steven Paul are confirmed producers and Jamie Moss will be adapting the manga into a screenplay.
The Wachowski brothers, makers of the Matrix trilogy, have commented on the influence of Ghost in the Shell in an interview. Producer Joel Silver also stated in an interview on the Animatrix DVD that he was shown the Ghost in the Shell movie during a pitch from the Wachowski brothers to indicate the style and look of the film they wanted for The Matrix.
Richard D. James, the electronic artist "Aphex Twin", has a song named Ghost In The Shell with audio clips from the show.