Hikikomori - Social withdrawal in Japan, Hiroshi Tomishige's blog about his experiences with hikikomori and thoughts about related social issues, is an excellent first-hand resource in English.
Hikikomori - Social withdrawal in Japan , el blog de Hiroshi Tomishige acerca de sus experiencias con hikikomori y opiniones acerca de temas de carácter social, es un excelente recurso de primera mano en inglés.