Rethinking Medical Education Through Connection: A Narrative Review of Cultivating Collaborative Intelligence for Sustainable Healthcare.

Modern healthcare faces unprecedented complexity, driven by aging populations, chronic diseases, global health threats, and widening health disparities. These challenges are deeply embedded in social, institutional, and environmental systems, demanding a shift from isolated clinical practice to dynamic, multi-layered collaboration. Yet, current medical education, both in Japan and globally, often underprepares learners for the relational, interprofessional, and systemic demands of real-world healthcare. This narrative review explores how medical education must be reimagined to cultivate "collaborative intelligence," the ability to engage across disciplinary, generational, institutional, and community boundaries. Drawing on educational theories such as Vygotsky's social constructivism, we advocate for a connection-centered, practice-oriented curriculum that embeds relational learning across all stages of training. Through redesigned clinical clerkships, interprofessional simulations, community-based rotations, and structured mentorship, students can develop not only communication and teamwork skills but also the ethical reasoning and adaptive leadership required in complex care environments. We also examine structural barriers, including institutional silos, hierarchical cultures, and outdated assessment systems, that continue to impede meaningful collaboration. We argue that embedding connection into the core of medical education is both a pedagogical necessity and a moral imperative. Ultimately, the goal is not only to adapt to the complexity of healthcare systems but also to empower future professionals to transform them toward resilience, equity, and human-centered care. In doing so, medical education can become a catalyst for sustainable health systems and inclusive communities.