We conducted a study on "anger" seen in obsessive-compulsive disorder (OCD). Subjects were 40 men and women (age range: 20-58 years) admitted to the Jikei University Center for Morita Therapy who had been diagnosed with OCD (DSM-IV-TR) and undergone inpatient Morita therapy. The Japanese version of the Structured Clinical Interview for DSM-IV (SCID) (DSM-IV Axis I and Axis II diagnoses), the Yale-Brown Obsessive Compulsive Scale (Y-BOCS) (changes in OCD severity), the State-Trait Anger Expression Inventory (STAXI-2) using "anger" as the indicator, and the State-Trait Anxiety Inventory (STAI) using "anxiety" as the indicator were used, and the data were subjected to statistical analysis.
 Improvements were seen in the Y-BOCS for all of the following: total score, obsessional idea, compulsive act, insight, and avoidance. These results indicate that inpatient Morita therapy improves OCD. In the STAI, improvements were seen for both state anxiety and trait anxiety. Improvement of trait anxiety may be considered an indicator of the cultivation of a hypochondriacal temperament. In the STAXI-2, improvements were seen for anger reaction and anger expression-in, which are both aspects of the obsessive-compulsive style (Salzman, L.). Improvements in these items therefore indicate that inpatient Morita therapy improves aspects of the obsessive-compulsive style. A correlation with the degree of OCD improvement was observed for the insight level. Poor insight was a factor associated with poor outcomes of inpatient Morita therapy.
 Furthermore, two cases were presented, and the actual condition of treatment for OCD and "anger" in inpatient Morita therapy was elucidated.
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