Look at this article on PSYCHCentral

Japan: Denial of Hikikomori Could Hinder Relief Efforts | Psych Central Professional

This is the link to another good article about this topic. It has a lot of helpful useful info. This disorder is very specific and i love that about it. it has alot of content. It shows that the disorder is most prevalent in Japan. It says that the individual usually only seeks help when their family needs them too, after becoming tired of the responsibilities of taking care of one with the disorder. It is a psychiatric phenomenon in Japan. There are very specific symptoms making this disorder very specific. It is very interesting.