Objectives Social withdrawal is emerging as a significant health issue in Korea. This study ex-amines the prevalence of psychiatric disorders, including personality disorders, and the psycho-social characteristics of hikikomori individuals in Korea. Methods We recruited 30 hikikomori cases from the hikikomori family association, internet ca-fés, and psychiatric patients at the Samsung Medical Center. Hikikomori is defined as a prolonged withdrawal from social interactions, lasting at least three months. Psychiatric disorders were as-sessed using the Mini-International Neuropsychiatric Interview and the Structured Clinical Inter-view for DSM-5 Personality Disorders. Self-reported psychosocial characteristics, such as de-pression, anxiety, and life satisfaction, were measured using various scales. Results The hikikomori participants were predominantly young, unmarried males, with high un-employment rates and an average duration of social withdrawal of 38.7 months. The lifetime prevalence of psychiatric disorders was 76.6%, with depression and anxiety being the most common comorbid conditions. The prevalence rates in the current sample for major depressive disorders, social anxiety disorders, agoraphobia, and body dysmorphic disorders were 46.7%, 16.5%, 10.0%, and 10.0%, respectively. Personality disorders were diagnosed in 63.3% of the subjects. Additionally, 50.0% of the subjects scored above the cutoff point on the Korean version of the autism-spectrum quotient. The hikikomori group exhibited high levels of depressive anxi-ety, suicidality, poor subjective well-being, and compromised physical health. Conclusion This study highlights hikikomori as a severe syndrome associated with multiple psychiatric comorbidities, including personality disorders and the autism spectrum. Comprehensive psychiatric evaluation for hikikomori individuals is essential to facilitate appropriate therapeutic interventions and social rehabilitation.
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