Mental health problems, such as mood disorders, are common among women in their perinatal period, and can negatively affect their daily quality of life, and their relationship with the child, as well as the child's behavior and development. Many professionals are involved in maternal and child health services, but their collaborations can be complicated and difficult. In this paper, first, we introduce the results of our research that investigated the problems of multi-professional collaboration for maternal and child health services in Setagaya Ward, Tokyo, Japan. Second, we introduced our intervention programs for improving maternal mental health in Suzaka City, Japan. Third, we describe our dissemination of the intervention methods for maternal and child health service professionals. Further implementation of mental health care in maternal and child health services is needed.
 Authors' abstract