Facing the unprecedented ageing society, Japan’s contribution to the world should be to lead worldwide discussion on dementia care. This chapter introduces the Japanese initiatives for dementia care. For realization of a society where people with dementia live well, the new concept of ‘prosocial relationship-based care’ for dementia has been introduced as the ethical background; community members are expected to reach out helping hands to each person with dementia to restore their participation in society. Based on this basic concept and the long-term care insurance system, various measures related to primary, secondary and tertiary preventive approaches for dementia have been promoted to achieve appropriate and seamless coordination of medical and long-term care. To establish prosocial relationships, it is critical to promote cooperation among various stakeholders, and develop community networks and social resources.