This is from a Post story today about Japan’s “nerd culture”:

Yet
some sociologists critical of the nerd culture here have linked it to
the high incidence of severe behavioral problems among men under 40.
Immersed in role-playing games and comic fantasy worlds, many have
found real-life personal conflict difficult to cope with– one cause,
some say, for a massive increase in the social problem of hikikomori ,
or shut-ins. Now numbering as many as 1 million nationwide, the
shut-ins – mostly men in their twenties or thirties – typically live in
their parents’ homes, rarely leaving their rooms.

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