Japan Unified Protocol Clinical Trial for Depressive and Anxiety Disorders (JUNP Study)

Inclusion Criteria: * DSM-IV diagnosis of Major Depressive Disorder, Dysthymia, Depressive Disorder Not Otherwise Specified, Panic Disorder With Agoraphobia, Panic Disorder Without Agoraphobia, Agoraphobia Without History of Panic Disorder, Social Phobia(Social Anxiety Disorder), Obsessive-Compulsive Disorder, Posttraumatic Stress Disorder, Generalized Anxiety Disorder, Anxiety Disorder Not Otherwise Specified assessed by SCID. * Depressive and anxiety symptoms is mild or more severe (GRID-HAMD \>= 8). * Ages 20 years or older, and 65 years or younger at screening. * Subjects who give full consent in the participation of the study. Exclusion Criteria: * No alcohol or substance use disorder in 6 months prior to the screening assessed by SCID * No current manic episode or current schizophrenia and other psychotic disorders at baseline assessed by SCID * No serious suicidal ideation at baseline (GRID-HAMD Item3 severity is 3 or higher.) * No life-threatening, severe or unstable physical disorders or major cognitive deficits at baseline. * Evidence of unable to participate half or more of the intervention phase. * No structured psychotherapy during at baseline. * Other relevant reason decided by the investigators.