BACKGROUND: The Organisation for Economic Cooperation and Development reports that one in every two people experiences a mental illness in their lifetime, and developed policy guidelines to address the impact of mental health-related issues on employment and health. The results of this policy initiative have been reported in many member countries but no survey findings are available yet for Japan. Previous studies in Japan focused on the social costs of mental illness, but little empirical evidence exists on burdens created by mental illness in individual households.
