Sagawa spent the majority of his life in prison. He was paroled in 2006 after serving approximately 25 years. Upon his release, he was required to register as a sex offender and was placed under strict supervision.

Issei Sagawa, a 26-year-old Japanese man, committed a heinous crime in Kobe, Japan, on May 24, 1981. Sagawa, who was 5'8" (173 cm) and weighed around 120 lbs (54 kg), had been stalking a 27-year-old woman, named Junko Furuta (not to be confused with another Japanese victim), but on that day, he encountered a 21-year-old woman, who was a part-time worker at a local factory. He kidnapped her, bound her, and then brutally murdered her by strangulation.

After killing his victim, Sagawa dismembered her body using a knife and carried out the cannibalistic act of eating parts of her flesh. He specifically targeted her buttocks and consumed raw flesh from that area. This grotesque act was reportedly driven by his sexual fantasies.

The "Fog" mentioned in your query likely refers to a book or document written about Sagawa's case. There are several books and accounts written about Issei Sagawa, detailing his background, the crime, and the psychological insights into his actions. One such account, titled "The Fog: The Strange Case of Issei Sagawa" (available in PDF format online), offers an in-depth look at Sagawa's life, his criminal behavior, and the implications of his actions on both psychological study and legal proceedings.

The case of Issei Sagawa is a grim reminder of the extremes of human behavior and the complex interplay of psychological factors that can lead to such heinous crimes. The detailed accounts and analyses of his actions serve as study materials for criminologists, psychologists, and law enforcement professionals, providing insights into the motivations behind similar crimes and the challenges faced in their investigations and legal proceedings.

The case of Issei Sagawa, also known as the "Kobe Cannibal," is a highly publicized and disturbing crime that took place in Japan in 1981. The incident gained international attention due to its gruesome nature, and it has been the subject of numerous books, documentaries, and films.