Hikikomori (ひきこもり or 引き籠もり Hikikomori?, literally "pulling inward, being confined", i.e., "acute social withdrawal") is a Japanese term to refer to the phenomenon of reclusive adolescents or adults who withdraw from social life, often seeking extreme degrees of isolation and confinement.
The term hikikomori refers to both the sociological phenomenon in general as well as to people belonging to this societal group. Hikikomori have been described as recluses, loners, or "modern-day hermits."
While the degree of the phenomenon varies on an individual basis, in the most extreme cases, some people remain in isolation for years or even decades.
Often hikikomori start out as school refusals, or futōkō (不登校) in Japanese (an older term is tōkōkyohi (登校拒否)
The Japanese Ministry of Health, Labour and Welfare defines hikikomori as people who refuse to leave their house and, thus, isolate themselves from society in their homes for a period exceeding six months The psychiatrist Tamaki Saitō defines hikikomori as "A state that has become a problem by the late twenties, that involves cooping oneself up in one’s own home and not participating in society for six months or longer, but that does not seem to have another psychological problem as its principal source."
More recently, researchers have suggested six specific criteria required to "diagnose" hikikomori: 1) spending most of the day and nearly every day confined to home, 2) marked and persistent avoidance of social situations, 3) symptoms interfering significantly with the person’s normal routine, occupational (or academic) functioning, or social activities or relationships, 4) perceiving the withdrawal as ego-syntonic, 5) duration at least six months, and 6) no other mental disorder that accounts for the social withdrawal and avoidance.
While many people feel the pressures of the outside world, hikikomori react by complete social withdrawal. In some cases, they isolate themselves in their room, apartment or house for prolonged periods, sometimes measured in years. They usually have few, if any, friends.
While hikikomori favor indoor activities, some venture outdoors on occasion. The withdrawal from society usually starts gradually. Affected people may appear unhappy, lose their friends, become insecure, shy, and talk less.
While hikikomori is mostly a Japanese phenomenon, cases have been found in the United States, Oman, Spain, Italy, South Korea and France. Recent research using the same standardized definition of hikikomori has found evidence of it existing in other countries as wide-ranging as the United States and India.