hikikomori
n.β Β«In fact, as many as a million young menβmostly teenagers, but increasingly older men as wellβsuffer from what is known here as hikikomori. Itβs a condition in which they seclude themselves in their rooms for weeks at a time (though the causes seem to go well beyond fear of women to traumatic experiences from the past, such as being bullied at school).Β» ββNo sex pleaseβweβre Japanese” by Paul Wiseman USA Today June 2, 2004. (source: Double-Tongued Dictionary)