The Early Intervention Service in Tokyo Metropolitan Matsuzawa Hospital“wakaba”was established in November 2009. In order to promote engagement with clients and their families as soon as possible and to prevent disengagement from initial treatment, we regard the following four issues as important：1. Provision of support to realize clients’ aspirations as well as relief of symptoms 2. Allocation of care‒coordinator to each client to provide care management 3. Assertive family intervention 4. Assertive outreach. The challenges that wakaba and the Japanese mental health system tackle include the improvement of the clinical staffs’ skill, the innovation of the medical service fee system to realize a multi‒disciplinary approach, the development of social resources which meet the needs of young patients, and definition of service components in Early Intervention.