PT Journal AU Sakamoto, N TI Hikikomori social isolation among adolescence. What don't we still know about social isolation among adolescents? SO Journal of Exceptional People PY 2023 BP 35 EP 43 VL 12 IS 1 DE Hikikomori; Social isolation; social withdrawal; adolescence; Japan; Europe AB Social isolation or withdrawal is a worldwide mental health problem which escalated amidst COVID-19 pandemic. In Japan "long-term social isolation or social withdrawal" is called Hikikomori and nowadays it catches more attention in European countries. In this paper, I introduced trends of European studies in comparison with studies in Japan about Hikikomori. Academic articles acknowledge the word and definition of Hikikomori in South Europe and significant number of studies is conducted in Spain and in Italy. Experts mainly focus on adolescents and young adults. ER