Purpose: This study shows a changing tendency of Japanese psychiatric hospitals, presenting "Visions in Reform of Mental Health and Medical Welfare", changed to "Hospitalized Medical Treatment to Living in the Community" and reducing the number of beds since 2004. Methods: This study uses a documentary survey, especially Jananese 「Visions in Reform of Mental Health and Medical Welfare System」 and a field survey on hospital built for early treatment and return to society after 2004. Results: Change tendencies of psychiatric hospitals are 1) diversification of isolation room and ward, 2) cluster of patient`s room, 3) phased organization of space, 4)individualization. Implication: This study will be an important data for researching plan of Korea psychiatric hospital which needs to change by global tendency.