This report examines global initiatives in digital health platforms addressing the challenges of aging societies, focusing on Japan, Singapore, China, the Netherlands, and Finland. It highlights strategies such as centralized and decentralized health information systems, integration of medical and long-term care data, and user-driven health management. Case studies illustrate how digital platforms—leveraging IoT, AI, and telemedicine—improve healthcare efficiency, resource allocation, and patient engagement. The report underscores the importance of digital transformation in healthcare to reduce costs, alleviate workforce burdens, and enhance service delivery, offering insights for Japan’s future policy development as its elderly population peaks around 2040. Additionally, it discusses the significance of government and private sector collaboration, robust data security measures, and cross-border information sharing. By analyzing advanced international examples, the report provides valuable recommendations for Japan to accelerate its digital health transition and build sustainable, next-generation long-term care services.