Tamaki Saitō is a Japanese psychologist and critic. He specializes in the psychiatry of puberty and adolescence. Saitō is Director of Medical Service at Sofukai Sasaki Hospital in Funabashi, Chiba. Saitō is notable for his study of hikikomori, a term he coined; he is internationally recognized as Japan's leading hikikomori expert.
斎藤 環
