This randomized controlled trial aimed to examine the effect of the Happy Science doctrine-based group psychotherapy on depressive symptoms in 118 Japanese mental disorder outpatients. The treatment group (n = 58) took part in five 90-min sessions at one-week intervals, while the control group (n = 60) received standard care including medication. Depressive symptoms were assessed before the intervention, 5 weeks after the intervention, and at 3-month follow-up. Compared to the control group, the treatment group showed a significant reduction in depressive symptoms both at post-intervention and at 3-month follow-up. In conclusion, this group psychotherapy might be of benefit in treating depressive symptoms.
Keywords: Buddhism; Causality; Happy Science; Reincarnation; Spiritual group psychotherapy.