hikikomori

The Japanese Ministry of Health, Labour and Welfare defines hikikomori as people who refuse to leave their house, and isolate themselves from society in their homes for a period exceeding six months. 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 Ministry of Health estimates that approx. 50,000 hikikomori live in Japan, about one third of which are aged 30 and older (Larimer 2000)